I really really need some advice…

My fiancé and I have been together for 11 years, we have a house together, and are supposed to get married soon, but ever since he proposed two years ago, all we do is fight.

Pre-covid I thought he was spending way too much time with his co-workers. They would constantly go out to happy hours, drink a ton, and he only invited me out a couple of times to join, while some of the guys brought their girlfriends to every event.

Over time, I’ve noticed that two girls are highly inappropriate with him (touching him, standing way too close, playing footsie, telling him that they are single cause they can’t find a guy they can be themself around like they can around him), but when I bring this stuff up to him he says I’m way too jealous/insecure and he doesn’t want to be around me because of that, which made him hang out with them more and more. He also says I should trust him enough that even if girls did flirt with him, I should be ok knowing he wouldn’t act on it.

During covid, it was nice that he finally wasn’t going out every night, but he would be chatting with these girls over slack ALL day. Like if I get a break during work I would make us lunch, do the dishes, take out the garbage…but for him a slow day of work means more time to chit chat with these girls.

During our fights he says the meanest things to me. He says that proposing to me and buying a home with me were two of the worst decisions he’s ever made. He says he doesn’t know if he will ever love me again and marrying me means a lifetime of unhappiness for him.

When we aren’t fighting he says he only says those things out of spite and obviously he still cares about me or he wouldn’t still be trying to make this work.

I feel like I’m in a yo-yo relationship and I don’t know what to do. Is there no way to mend this? Should I stop trying to fix this? We started going to a couples therapist, but I feel like talking through these issues with him just makes him more mad. I feel hopeless and the last thing I want is a husband who doesn’t want to be with me. I’ve still been trying cause I love him, but I just don’t see a light at the end of the tunnel.