@Thomas:
I have about 2 exes that I can't let go of (in terms of thinking about them). I know it isn't right and I keep struggling to deal with that. One is still friends with me and I help him in so many ways because I feel I have to. I think I love him even outside the erotic relationship we had and that helping him will do no harm, and things are going on well. I don't think there is any harm in you helping your ex, and of course that's if and only if there is no string attached to it.
Well, I was watching a video of a sermon by Juanita Bynum and she talked about how the expression "Being single" used in the Bible isn't really referring to not having a partner but rather to "Not having a sexual bond or fellowship to someone". She further explained that in order for God to see us as single and to provide us with our Mr. Rights and Mrs. Rights, we need to break those bonds with our exes. Actions always start from thoughts so I would advise you analyze the situation and know where you stand. *Blessings*