I think some people remain in our hearts even if we move on into a new relationship. I personally could not be friends, when i wasn't in a relationship we would end up together again...we even vowed just to be friends and not mess up ..didnt work and we ended up wanting different things...I seriously think having such a person around doesnt allow you to move on, and you always think of them.
I honestly dont think it's possible to remain "friends" w/ an old flame.. for me at least. I have been the 1 who cud not get over & the 1 who was Just not comfortable remaining w/ sum1 i broke up w/ even tho he was my best friend. Cant believe i dated him. Ugh ew.
I was humiliated, dumped on my ***, and scorned for a year.
A lot of alcohol, time will heal everything. We don't even say hi when see each other, like total strangers. Which I felt is good.