Asalaamu Alaikum, My sister it is not permissable for you to help a non mahram man for he is nothing to you but a stranger. It is also not your responsibility to help another non mahram man. What you must do is give him the following links:
http://www.al-jannah.co.uk/home.htm
Tell him to E mail the following organisation as they specialise in helping and supporting Muslims who are going through what he is going through with regards to attraction to the same sex.
Al_Tawbah@yahoo.com
After you have forwarded these links to him then leave it at that and cut off all contact with him. Have a fresh start with your life and change your numbers and e mail addresses for this will also help you internalise the changes. You are only sinning as long as you remain in touch with him. You cannot change him or anyone else but give him that link and make one final dua for him and leave the rest to Allah.
It is best you move on with your life and look for a good pious partner. Thank Allah he exposed him otherwise your life may have been ruined by such a man. Learn from this and know that Allah has in store for you a much better man as long as you go about finding a partner in the right way. If we do everything to please Allah then he will do what is best for us.
If there is any other help or advice you need then please do not hesitate to ask as we are here for you.
I pray Allah finds you the best of partners. Ameen
And Allah knows best in all matters