How do you keep a man interested in you?

i met this guy online. we've been emailing and chatting with each other for a couple of months now. i think it's for keeps, or at least i hope so. we've even said i love you to each other and stuff. it's been great really. in fact we plan to meet each other face-to-face soon. the thing is, lately i feel like he's drawing back a little and that he seems to be losing interest. what should i do? is it just a spring fling thing do you think? is it possible he met someone else? has he lost interest in me altogether?How do you keep a man interested in you?
b careful meeting people online and investing ur feelings in a relationship when u havent even seen the guy. what happens when u first meet and the chemistry aint there? for u, him or both? online relationship sometimes u fall in love with a fantasy not the real thing, people can say or act like anything on the computer, tell u what u want to hear.. the real test is face to face on a daily basis...im not saying they dont work just be careful....How do you keep a man interested in you?
Ask him, and he should answer honestly, if you are planning for a long lasting relationship.
stay sexy and exciting
why dont you test this by doing the TAI (temporary avoid and ignore)? Give him something great to keep his ego up, and then disappear for a week. If he has other opportunities he is pursuing he will be too busy to get back to you. and if on the other hand, you see signs of excessive emailing, and other type of contact, you will know that he cares truly, but perhaps just had to deal with other stuff in his life which moved his focus off of you temporarily and was really innocent because guys tend to do that often (need to respect his need for personal space)
If you meet him face-to-face then go out with him and be yourself. If you were stood up then meet him online again and ask him about this.(Oh if you do date him what ever you do dont use sex to keep him interested he'll only be interested in your a** not you)
i think he's just flirting with you, if he is really interested in you, he should have invited you to meet him..