I have Bipolar I deal with all the havoc it can cause for myself and others.
What I will offer as advice is sit down with your friend and explain that you are concerned your going to burn them out etc..
Explain to them what boundaries are..Yeah most people don't have a clue when it comes to how they work and how to use them effectively.
I was burning out a friend about 4 years ago and didn't even realize it.
She started to cry one day when we were out for lunch, I was so worried she kept deflecting my questions... I finally got her to 100% honest with me... She was in a almost constant state of fear that I was going to off myself, that every time I would start a new medication or be in a high or a low or anywhere between. I would pretty much dump everything on to her. She knew I didn't realize how much I did "dump on her" I felt a millions ways of OMG how could I dump so much on my friend...
I realized that I had no right to expect her to be in a state of constant worry, or having to hear every tiny thing about my Bipolar and Fibro struggles ... Sure friends talk about there problems .. But especially with Bipolar it's easy to become a burden....
I realized that I have a T and well HE is the person I can dump everything on and him and I can wade through it and keep moving ahead.
Bipolar wasn't removed from my friendship with her 100% , she still knew roughly how I was doing. But I do know that I talked too much about it and my pain, That seemed to be our main topic of conversation my shyt and not just her and I being friends.
I also learned around the same time that I was doing the same to my husband , he the " fixer type" I say I am feeling suicidal. He would jump into "save me" mode . I would be down he would jump into "lets cheer you up" mode... Arrrrghh, non helpful.
So now? If I am not doing well at all , I give my husband a heads up , as normally I am so good at hiding things I need to verbally tell him hey I am feeling _________. He has learned through boundaries that he can't fix me, he has learned to allow me space, but more hugs daily, He is there, he knows he has to trust that I will listen to him if he sees me in a really horrible place and him and my T might have to step in and point out the obvious if I can't see it clearly.
I have made a few lifelong friendships with people I have met on here.. I can be blunt and tell them exactly how I am feeling and they are just going to "get it" they know how to deal with the skewed way our minds work..
So think about boundaries and how you and your friends can use them so that your friendsships can have more balance.
Dump everything to your T , Or here on PC in general and with people you have grown closer too, Yes dump it all out, just learn ways to be mindful of how it can be hard for someone to handle it all if they havent had to live having Bipolar..