A break-up pretty much sucks in any situation. But most importantly when you were together for that long. Obviously it´s not going to be easy at all. I know that sounds scary, but it's the truth. And if you really want to keep being friends with this guy you're gonna try to get used to the idea that he might start dating someone soon and prepare yourself mentally and emotionally. If you seriously think it's a good idea for you guys to get back together, don't be too pushy. Don't stalk him (as in following him around, not giving him enough space, etc) give him time to think about what happened between you two. Keep talking to him now and then in a friendly not desperate sort of way, and if it's meant to be, destiny will take action. Personally I think that if he wanted to start seeing other people, you should do the same. If he seriously feels that way, don't push yourself because if you get back together, and he still has those feelings, there's a big chance he might cheat. I hope that helped! Good luck!!