Depression during pregnancy?

I have never experienced depression symptoms prior to being pregnant. I am now 12 weeks and some days and feel like I can't enjoy this pregnancy as much as I want to. What upsets me the most is that I don't have support from my boyfriend of nearly 5 years. Since discovering I'm pregnant (took the test May 21st), he is slowly distancing himself. We do not talk as much and we rarely see each other. Though this pregnancy was unplanned, our relationship before this was NEVER like this. We would hangout every day. I made a counseling appointment for Monday. I am just devastated that he is acting this way, which is why I've been so sad. He shows interest in wanting to come to every doctor appointment. The next one is this Wednesday. What should I do? I have already tried talking to him about how I feel. Should I just wait until he is ready to come around? This is so hard on me. We both are first time parents. I am 21 and he is 23.