Somehow you and your ex has something in common. The mind set of being friend may still be there.

After all, he was/is part of your life. Maybe there is something you can't get over, and likewise in his case. The decision you both made was bad one. However, deep down you too may be feeling regret. Contacting you afterward may suggest it is coincidence or your mind are connected somehow. Lots of things in life cannot be explained easily.

I think its b/c u guys have so much history and past together. I can't explain it but my friends and I who are really close have this happen to. We wont hear from each other in weeks or months then when we think about them..bam the phone rings..i cant explain it its weird but cool. I think you guys will always have a special bond b/c of all you guys have been through, especially with your dad's death(i am sorry for your loss). However, he has a family now and I feel like you deserve the same. I think its best to move on. You can keep in contact with him every now and again as long as its not holding you back from living your life. It seems like you guys will always have a strong connection but if he has moved on you should too.