Abortion or no?...

My fiancé of two years and I recently found out that we’re pregnant (he’s 18 I’m 17) we’re still in high school and he has his heart set on wanting the abortion but I have a problem with it because it would go against everything I believe in. I get really depressed a lot and I know that if I get it done I’ll blame myself for it and I’ll resent him for wanting it so badly.. I don’t know what to do and I just need support...

**UPDATE** Thank you guys so much for all of your kind words... he knows I don’t want it but he thinks I’m being unreasonable and irrational...