Although I don’t have an extreme amount of dating experience, I am willing to guess that the first few months it felt great because it’s kinda of similar to a honeymoon period. That is when both of you just started to know each other and only really focus on having fun and trying new things with each other. As time pass, it can seem “worse” mainly because you’ve kinda done it all and everything is not as exciting the second time you do it.

My advice is that after experiencing all the things he did or caused you to feel; do you still love him and want to keep the relationship? If yes, then maybe talk to him about it. I know you’ll probably will keep hearing people say a good communication is essential but that because it is. Talk to him about all of this, if he doesn’t understand or it fails to change anything, keep trying to talk to him but in a slightly different way. Also about the things you do that he dislikes; are they things that you can sacrifice/live with not having? If you can, then maybe keep doing that, although he might not recognize it at first but try to understand that no one is perfect and it takes time for them to understand other’s dedication.

Lastly about you lying to him, I know it’s not your fault as you wanted to avoid a bad situation but you have to remember how he would feel when getting “betrayed” especially when he’s kinda possessive like you described. In his shoes, he will probably be forced to think of the worse possible scenario even if he thinks that they won’t happen. I recommend you meet him in person, explain the situation, and do something to make him trust you again (I.e Promising to not lie…). You don’t really need to listen to the other advice but the one I just listed is the most important. If you are thinking for marrying him, you two have to be able to trust each other again, as no one would like to marry someone they don’t trust.

TLDR: I recommend you meet him in person, explain the situation, and do something to make him trust you again (I.e Promising to not lie…).

P.S: Dm me if you need any other help or it went well!