Cassie,
I'm gald that you decided not to have an abortion, and that your boyfriend is now being supportive. Please do not commit suicide and hurt yourself and your baby. I know what it feels like to be in deep depression. I've had suicidal thoughts in the past and if my then boyfriend now husband had not intervened would likely have acted on them. There was an entilre semester at college that I just shut myself in my dorm room and I didn't go outside except to eat because I felt paralyzed and felt I just couldn't face the world. I kept this a secret and acted like everything was okay. However things came out after I failed all my classes. Since then I have had counseling to help deal with some of my issues and I have been much better, but I think it is something that once you have been through you still have to face to a smalled degree on a day to day basis. Keep talking to your boyfriend. Don't clam up like I did - don't hide it and lie about it like I did. If you can afford it I would seek counseling. It can help.
With all the hormonal changes in pregnancy depression is not at all uncommon. (Lately I've been feeling some of the depression from the past and fear coming back and it scares the heck out of me, but I know I have the strength to overcome.) The stress you must have had to deal with with an unplanned pregnancy and the break up and getting back together with you boyfriend, pressure for abortion and choosing to keep the baby...all of this stress can't help either. That's a lot to handle. Talk to your doctor. Perhaps there is something to take for depression that would be safe for the baby and/or they could recommend a good counselor. If you ever need to talk I am here. Best wishes.
Kate