is he for real?

well to start off im only 16, I have been on and off with this boy for about 3 years now and im about 6 weeks pregnant with his child, I truly do believe that I am in love with him and I know that he loves me he just doesnt feel as much need to show it when we are not together, currently me and his are broken up but trying to make things better, the past breakups have been over stupid things and everyone knows that we always eventually end up together again, but lately things have been different, he will come to my house and be all over me and tell me how much he loves me and wants to work things out and everything seems perfect but as soon as school comes along hes basically a different person, I mean yea he gives me some what the same attention and says the same things but only in the notes we right back and forth, I get really concerned because he has a lot of “close” girl friends and I dont know whether or not to keep my guard up because he tells me that they are only friends and he only wants me and the baby and not to worry abut that but im not sure if hes being truthful because things like this have happened with both of us before (minus the baby) and also he is getting a major ego and pretty cocky when it comes to girls but he always end up back where he started…with me… I just dont know what to think about his actions and how to take them. does he mean what he says or not?