I have my first prenatal appointment tomorrow, my boyfriend wants to come?

Yes, let him come with you, especially for the first visit. If you are lucky enough to get a l ultrasound, you'll both be able to see the little one on the screen, which is such a huge moment to share. Even if you don't get that, and they do the pelvic exam, he should witness that to get him accustomed to the idea of everything. When you near time to deliver, you'll be having check ups like this and when you do deliver, I imagine he'll be right there...it will probably help him get used to the procedures and become more comfortable with everything. Congrats!