I think I've lost my husband! any advise

ok so thursday my husband asked me to go to his job to go get the money for “child support” because he couldn’t come to drop it off. so I went to his job. We (the kids and I) went inside his job and I text him saying we were in front of his dept. (he even told me to let him know when I was in my way.ahead of time of course). so this meat cutter comes out and stares at me and I was trying to figure out who he was because he would always talk about the people at his job to me. anyways a few minutes later he comes out. he introduces my youngest to this lady that works there and my oldest already met this lady and says hi. so then the meat cutter that was looking at me my husband goes to him and introduces the kids to him. ( I felt like an outsider because he left me out ect) anyways he starts walking and goes down one isle and we go down the other. when we get to the front of the store my husband goes and starts talking to the store manager and told the kids he’ll meet us outside or something idk. so he stood talking to the manager and the kids went to use the bathroom. he goes out the one door to go get the money and we go out the other door which was closer. so we meet outside and he gives me the money and told me to give a certain amount to his mother for half of one bill. so he was going to start walking the same direction we were but when he notice that he turned around and went the other way. he saw us inside the store but went his way and we went ours. (later that day he called his mother telling her that the meat cutter guy and I were checking eachother out. (which wasnt true at all, well not on my behalf anyways.) my mother in law and oldest child told me he sounded jealous. was he jealous? I couldnt tell. well then on Friday my oldest has been misbehaving like you would believe, so I text him telling him everything. and we even talked on the phone and everything regarding our oldest sounded fine. he sounded stress and mention something to me about our car insurance policy. so then saturday my youngest wanted to go with him. so my youngest called him and talked to him and he said he was gonna go pick them up by 10:30pm. at first he said maybe then he said he had stuff to do. my youngest even started questioning that what is he doing on a Saturday night. so when my youngest called to ask him he didnt answer her but said he was tired and had just gotten there from work ect.so anyways that when he said he’d come by 10:30. so then my youngest called him but he didnt get the phone. so by 11pm i started texting him. he wasnt answering my texts so we called my youngest left him a message. still no answer. so i sent him a text asking if he was still coming. he said he was on his way. I asked how long and 2 questions marks after he didnt reply and he said 30 mins. I said thats late and he tested well then the morning. I said I’ll take them to you. (i know he doesnt want me going to where he lives. idk why) I dont trust him at all because I know he is always up to something. I knew he wouldnt want me to go to where he lives either so that why I told him that. he texted no i’ll be there soon. just leave them in my moms room. (can you believe that?) I said were on our way see you in the apt. he said nope I’ll meet you at so and so. then says he was at the gym and told me the gym ect. so I started talking to him about the gym but he quit texting about it. and that hurt me.oh he told me the gym because I said which one but I meant in which place to meet him at. thats why he told me. ugh. anyways after that convo he calls me asking me if were already on our way and I told him yes but then no and that we were on our way to the car. so we got in the car to meet him where he told me to. so we met at the place. and I asked him if he could check the car window out for me which is messed up. so he went to check it out for me and while hes doing that he gets a phone call which he kept the phone very close to him so I couldnt see who was calling him. so I told him dont worry about it. I said bye and he made the peace sign with his hands. that really annoys me. ugh. anyways he came around to get my youngest from the front seat of my car. he grabs her and gives her a hug and then starts saying bye. and then says be careful or drive safe, idk. and then I took off. as soon as I left he went back on his stupid phone and the kids didnt see him because he was outside the car while they were inside. so then I decided to call. I called and he answered. I said may I please talk to my daughters and he hung up. then I called twice and he didnt pick up. then I called a forth time and he picked up but was talking to the kids and then said hello a few times I stood quiet and didnt say anything so then he hung up. as I was starting to write this he called and I didnt pick up and then he left me a stupid voice mail. he was talking to the kids saying she can call whenever she wants, then starts saying you can call whenever you want to talk to the girls. hasta luego bye (in a weird voice he said that) I didnt call back or anything. then he called another time and I didnt pick up but he didnt leave a voice mail this time. he wasnt wearing gym clothes either. he was clean and had perfume on. so with the above said. can someone give me any insight on how they see this situation, I feel very very hurt and feel that he has already forgotten about me. I feel so hurt. as I was leaving I started crying in my car. he also stated thanks for bringing them. ugh. as when I went to pick up the money he thanked me again. now I dont think I have any chance of getting him back. anyone please I feel very desperate and am at my wits end. how could he move on after 12 years together and 2 kids with so much memories ect. I just dont get it. im not gonna be his door mat anymore if I have even been that. anyone please tell me what you think. please help me. thanks heres a link to my original post:https://ebpforums.com/boards/topic/my-soon-to-be-ex-husband-says-he-wants-to-be-friends/