[LittleMiss]

I'm curious, what's your current boyfriend's stance on this?
Would he be happy to wait until marriage for you?

What you are doing now (having unprotected sex/using the pull-out method) is not going to 100% prevent you from getting pregnant. In fact, for perfect use, the pull-out method has a 4% rate of pregnancy and typically is around 15%. That's a whole lot!

If you were to become pregnant, that would be an obvious indicator to everyone that you're having pre-marital sex (as well as changing both you and your boy friend's lives forever).

What would be worse do you think? Having a child out of wedlock or using condoms? Think about it.

You say that having sex with someone you love doesn't seem wrong and by the everyday person's standards, it's not however, you've said you are a hard and fast Catholic. For you, It is a sin no matter how much you and your boyfriend love each other.
My only solution for you if you still want to have sex, not use contraception and not be sinning is to get married. But I don't recommend that since divorce is also against Catholic doctrine.