Family help: My boyfreind of 20 years has been great about my mental illness until now-I am bipolar. - Help.com

maybe you should try and make new friends?
Its always good to have people to talk to outside of a relationship, otherwise you put too much pressure on it.

I can imagine your boyfriend would be put under a lot of pressure. Now don’t see this as your fault. It isn’t. But there will be pressure all the same. I suggest you support him in what he is doing. If he sees you care about how he is, he won’t break up with you. If, however, you condemn what he is doing because you fear that he will pull away from you, you will only distance yourself from him.
This might also be a chance to see how you can see new people or get help. Now if you’re in a rotten mood don’t consider it yet, wait until you feel better. I know, even though I’m don’t have bipolarity, that considering something when I’m grumpy is never good, I always think of the worst.

you need to find a way to develop your own independence. being co-dependent on your partner can bring a lot of stress into a relationship, especially if they are dealing with their own problems, which it sounds like your boyfriend is. are YOU seeing a therapist right now? or do all of your problems fall on your boyfriend’s shoulders? you need to help and take care of yourself before you can establish a true relationship of equals. your boyfriend is trying to push out negative influences in life. be a positive influence.