He is avoiding intimacy

This is such a painful situation to be in. It sounds like either he’s getting sex from someone else as Ewa said or he’s no longer physically into you because of the weight gain. He’s created a lot of barriers to being intimate with you but he’s not trying to find a solution, which is telling. This isn’t going to get better if things continue this way so you’re going to have to gather your courage and talk with him. You are going to have to go into it prepared to hear anything he has to say and just take it in rather than react. Best case scenario, you can be solve this together or worst case scenario, he’s already checked out and he wants to break up. If that’s the case then you will want to know sooner rather than later and you need to let him do that, don’t do it for him because you’re hurt and offended. Ask him to set a time when it’s good to talk. You may want to try driving or walking while talking because it’s easier for men to not have to sit across from you and look you in the eye the entire time. Let us know how it goes if you decide to do this. I’m sorry you’re experiencing this.

This is also difficult to do, but try not to internalize that his behavior and withdrawal is your fault, about how you look from medication, or anything you did! I’ve been in a very similar situation with an ex-boyfriend and it destroyed my self-esteem because I blamed myself for his withholding and seemingly sudden lack of sexual interest. Things didn’t work out for us, and I had to rebuild my self-esteem and how I defined my value after giving it all to him! And when I did that I realized that most of our issues in that area had more to do with him (he had commitment fears with women in general and this is how they manifested in our case) than me. Nothing was wrong with me, and he didn’t even see me in a negative way when he wasn’t dumping his baggage on me, so just for my own sanity I wish I hadn’t taken it so personally. And I learned from that experience not to take it personally in the future, because someone else’s feelings and how they choose to act (such as not communicating about issues) is not in my control. But in reality, things had gotten mutually toxic with my ex, and my self-esteem was able to rebound a lot faster when I cut off our contact for a while after he broke up with me. I hope you are able to find a way to both communicate well with each other, but please try to remember no matter what that you are worth more than his opinion of your weight etc. I think the issue is more about control and his own stuff anyway rather than about your weight if he’s so prescriptive about how he wants you to approach him and what time and that it’s all about him him him calling the shots in your sex life without much regard to your feelings. But no matter how things go, don’t abandon yourself, be kind to yourself instead.