As I am going through the exact same thing, my advice would be for you to not call. Closure is very important but the answers you get from him will probably just cause more questions so it will just start a viscious circle. The more you speak the more you want to know. Just sit tight and spend your time trying to do things you enjoy. Spend time with friends, start a new hobby, read some self-help books (they really help) If you meant anything to this guy, he will contact you in due time. Calling him may make matters worse. He will wonder why you haven't been calling him and if you happen to see him in person be strong and confident say "hi" and keep moving. When he sees how strong you have become without him it might start him thinking. Sometimes people end relationships just to have the other person begging for a chance and to get the "upper hand" in a relationship. It makes them feel like they "control" the relationship. If this is the case, showing him that you ARE able to live without him might be just the ticket to show him how strong you really are. It might all work out in the end but it may not.....this approach makes you stronger either way....Good Luck.