My boyfriends kink is ruining us I think

So... my boyfriend has a really intense kink, he loves the idea of me fucking another guy.

Like, loves it.

Like when he masturbates or has sex with me, sometimes, he has me talk about it.

And you know I'm all for doing links and stuff, as we are in DDLG, but... he also has severe depression, so whenever I actually kinda follow through, he gets really mean and suicidal, and then wonders why I won't do it.

I love him so much, but he constantly begs me to do it, and will even ask about past relationships, try to make me talk to exs, and just hook up with random guys.

This takes me out of my comfort zone so much and he always says he will never do anything to hurt me, especially because he knows I'm not really into it, yet he constantly does it! Half the time I feel like he's just trying to get me to leave him..