Crying off my face...

Lilly • I'm 16. My boyfriend and I have been dating for a year now and we're taking about sex.
Me and my boyfriend are growing apart... We used to be close and affectionate and we would tell each other everything. Now he doesn't show me any affection and he talks to a different girl for advice or problems. A lot of the time, I feel like he only keeps me around for comfort and the fear of being alone forever if we break up. I love him and we've been dating for over a year. He's my first love but I'm not his. How do I say goodbye to him without him feeling like its his fault?...