Will me and my boyfriend be able to stay together?

My boyfriend and I first met at school when I was 14 and he was 15. We were together all about 6 months and then we broke up due to it being a very young and naive relationship and we argued over countless things. He was my first everything (I wasn't his) but he always has said I was his first love. For 3 years we didn't have much to do with each other, we occasionally had nice conversations and flirted a bit or we met up once or twice but other than that we basically didn't exist to each other. It took me however a lot longer to get over him and realistically, bar the exception of one other person I have never truly got over him. About 5 months ago he started talking to me again and we've been together for the past four months. He's never had another girlfriend and I've never had another boyfriend and our relationship right now is basically perfect. He's had his fun in the past 3 years and so have I (meaning we've both not just slept with each other and have got on with our lives separately.) he's going to university in September whereas I have decided not to this year. His university is only an hour and a half away from me so it isn't too far, but what do you think the chances of us staying together are? He truly believes we will but I am much more sceptical. Any thoughts??