[purgitory]

Please someone give me advice.
I met a man online 6 months ago. Things have been incredibly wonderful and in fact i am going down to see him in a month. We get alonggreat, talk on the phone all the time, and I love him and know he loves me.
Heres the problem.
He is 32 I am 22, he was married for 8 years until2 years ago when his wife cheated on him and they divorced. They have been divorced now for 2 years and they have a 3 year old child together. I know that he would do anything for his child, and he does all he can to be there for her and spends every weekened with her. My issues is that I am jealous of the closeness he and his wife have, in the sense that she will call him all the time and inform her of thier childs day which is great, but a month ago her mom died, she needed comfort an so he went over there to help in which she tried to sleep with him. He turned her down, but now I know that she wants him back and I am worried that he will leave me to go back to her. She called him the other day cause she had a bad dream about her mom dying and he talked to her (while i was holding for 20 mins on the other line) and today she called him saying that thier child is acting up and she cant take it and that she is going to lose it, so he went over there to help. Is it just me or is she trying to work this child thing a a wayto keep him close? Is this a form of manipulation or am i being paranoid. I have talked to him and told him how i felt, but he assures me that there is noreason for me to be jelous, and that he doesn want her back. I dont know..... I have never dated a man who has a child or who has an ex wife so I am unsure about what is ok. How close is to close? Its not exactly him that i dont trust, i know his motives are good ,but its her. I worry that she is trying to manipulate him and using thier child as a tool. I dont want to get hurt, I love him, and I am comited to working things out. I just dnt know people who have exes, with children to talk to, so i am at a loss on knowing what is normal, and what is not.Please let me know what to do, and what to expect, Its really hard wanting to let go, but worrying that he may be still harboring feelings for her.
Thanks