I'm pregnant and I feel like the only choice I have is to give it up for adoption.

I just found out I'm Pregnant the day before mothers day. Ever since Ive been very unsure what I want to do. I finally feel like I know what I want but I haven't told my boyfriend yet that I want to keep it. But the way he's acting I feel like I have no other choice but to give it up for adoption or hell be mad at me. Hes been really depressed lately and says me having a kid is gonna make his kids upset. Make them think they arent good enough. And they are gonna always ask why my kid can live with him but not them. I don't know what to do cause I really want to keep it. But I feel like Im just gonna make him mad at me or really depressed.