We are very close we always talk to each other about every problem. I have bipolar and had no choice but to go Unmedicated in order to switch meds as weight gain was dangerous.
Have you gone onto a new med now? Please do, it's very important.
he wouldn't have sex as he was worried I would regret it when I was back to normal
This was very ethical of him. I had an FWB and he exploited me to the max while I was hypomanic- got me to do all sorts of things.
Another friend visited and I ended up having sex with him me and fwb were never exclusive although being honest apart from being exclusive
If you genuinely hadn't had the exclusivity talk and had started out as FWB, he has no right to have a problem with this.
Well he is hurt as the sex I had with a mutual friend while manic has come out
He should appreciate that friend kind of took advantage/made use of you. Other commenters mightn't know what it's like, but I have bipolar so I know what it's like.
kissing me and cuddling me all night and asking me what did he mean to me? And I can tell he is hurt but he won't speak about it and I don't know what to do? I never meant to hurt him I didn't expect him to be hurt but if he won't even talk about it how am I supposed to help?
If he's kissing etc and asking what he means then that sounds promising, doesn't it? Tell him what he means to you (he means tell him whether you want a relationship or not, or it's definitely an opportunity for you to say how you feel.) Apologize that he's hurt but say you weren't exclusive at the time and also you were ill or it probably would never have happened.
Maybe he did say in the past he didn't want a relationship ('not good enough for you' tends to just be a way of saying that) but has changed his mind. I would say that he needs to make it clear whether this is a relationship or FWB (sex when you're well.) It's not fair of him to mess with your feelings by not letting you know where you stand.