Are you serious? Do you know how heartless you sound right now? When you have kids you don't just "get rid" of them. You have to take responsibility and care for them. If you didn't want to raise a child then you either should have given the baby up for adoption or not get pregnant in the first...
Just keep telling this guy you are not interesting in going out with him and possible try ignoring him if he doesn't stop. Also if you and your boyfriend think it's easier to keep the relationship a secret for now then continue to if you guys thinks it's for the best. But if you want to have...