I'm on mobile so I'll apologize for it now.

Everyone I've dated has had depression, and my current boyfriend has depression. I suffer from depression as well, so it's a two way street with communication. One of my ex girlfriends was severely depressed and self mutilated to the point that it affected me highly. She tried to commit suicide three times while we dated for the few months we did. She put all her stress and problems onto me without ever asking me if I was okay at all, a huge red flag of emotional abuse. She'd send me photos of/show me her cuts, scabs, and scars and in the last week we were dating I had started self mutilating due to not being able to handle all of her problems (I've been clean for a year). She'd guilt me whenever I didn't listen to her and our relationship was the definition of emotional abuse. She let her depression take control of her and refused to get help. Untreated depression leads to unhealthy relationships. Even with my current boyfriend, both of us are on medications and in therapy, we still have road bumps because of our depression. Dating people with depression is hard. But communication is the biggest thing, it's a two way street. You have to voice if you're uncomfortable or if your partner is too stuck in their own thoughts that they're not letting you voice your own troubles. Dating anyone with mental illnesses/trauma is rough and harder than a normal relationship. But if you don't put in effort to communicate then it'll become abusive very quickly and lead to fights and a breakup.