Help, I'm lost

So my boyfriend and I have been together for about a 15 months, but before that - we were dating for a year. he is the love of my life. Before him, I was in two "long term" relationships. One for 11 months and another for 2 years. But I know that this is THE ONE. This is the relationship I have put the most work into, simply because I'm completely in love with him. I can't even begin to explain what we've been through in one year. I thought that meant we could get through anything. Recently, we decided that we are going to go to college in separate states and he expressed that "he can't do long distance." Does that mean he doesn't love me? It's February, I plan to leave in August. So we pretty much agreed that we will "break-up" in a few months, i mean - how do you plan a break up? He said that we should try dating other people along with eachother (when we come home we would just be with each other.) without thinking, I agreed. But, now that i've had a couple days to think about it I AM DEVASTATED. I don't think I can do it. But I want to because I want him. Also, I am his first real relationship so he thinks that doing this whole dating others and eachother thing will be easy. I am 21 and he is 20. We are young and we should experience the world but I'm in love with him and I want to experience the world with him. I think I might stay faithful to him despite our agreement. I just don't know what to do. I wish I wasn't girl, fuck feelings. BUT PLEASE HELP ME

Yes, you are completely right. I blame my absentee dad for that. Anyways, part of me is really excited to start this new chapter in my life. I know I need to learn to be on my own. As far as the whole dating each other and others, how do you think I should approach it? Should I do it? Part of me wants to and the other part - just cut contact for a while so I can learn to be on my own and such.