I never for one moment regret having my kids. The regret I do have, is that I didn't wait til I was out of school to do it.
If I could do it over I would definitely have waited until I was in my 20s, married & financially stable/secure, but that being said I love my children with everything I have.
If you are feeling this way, I feel you and your guy need to have this conversation...soon. Don't compromise your beliefs or feelings to make someone else happy. You need to be happy...all around. It's a very big decision, and not always the easiest. I wish you luck!