I do think you should make contact with one of the Rabbi’s or orgnizations mentioned, asap.
One thing about the computer, there is you know alot of Torah that can be read and listened to, different Shiurim or many topics. Possibly different sort of frum communities that may be of interest.
Realistically, lets say, he is likely interested in meeting girls this way. I am only surmising this sort of social thing i have no clue.
You aren’t going to stop this Taavah you know. So maybe funding or making sure he has the Shiurim on MP3 or the interenet is your prerequisite. IN your own time, investigate who is a dynamic speaker or MAggid shiur online. I personally like Rabbi Mansour, he has a warmth and intellectual rigor that your son may relate to.
But looking and meeting girls you can’t prevent I don’t think if he is so inclined.