You're both adults, make an adult decision. Seems like it is time to move on, so you should come up with some arrangements for who is going to keep your son and visitations, child support, etc. Then I would suggest you take some time away from guys for a while to get yourself in order for you and your son, then get into another relationship. You don't want to become desperate without a guy around and go from dude to dude, so learn how to deal with life by yourself first.