Thank you everyone for your advice, I really appreciate it.
CANDC- I've been trying really hard to not become the main caregiver, but it's such an easy role to fall into, especially since my past relationships have pretty much followed the same pattern. I'm a very insecure person when it comes to relationships; I don't think very highly of myself and that's only magnified when someone else's expectations are involved (I'm working on that). The problem is that I don't know when to say enough is enough, I don't trust myself.

Healingme4me and divine1966- you both make very good points. I'm conflicted, because whereas I've had so much therapy and have had so much time to grow and learn to manage my depression, my boyfriend is only beginning to get help. His second therapy session is today, actually. We do have our good moments, though they are rare lately--where I feel like he still cares for me--but two second later he is back to being cold and distant. It leaves my head spinning.