I am 22, and I have an online friend who is in their 40's. Their profession is a life coach and they have been very helpful (I have my own private therapist on the side)

However we are mainly friends and usually talk over the phone once a week. However, my crush for him has grown 

I am aware that he is in a relationship himself, has his own responsibilities, and that I myself am not stable. Hell I wrote a suicide note in a fit of rage 2 days ago so I am in no way able to be anyone's partner 

We usually talk every Sunday and now, I'm thinking of making an excuse and telling him I cant talk 

Confessing would be toxic, and maybe distance would be the right thing to do