1. borrow their hp, and see their messages, contacts. i have a
feeling some guys like to show off that they have gfs.
2. best if you have access to their blogs ( that is if they have
one )
3. check their friendster profiles etc, and search through
testimonials. to reconfirm your suspect of his gf, go to the
profile of the person whom you suspect is his gf, and look for a
testimonial that he left for her.
4. try talking about your relationships to make him say something
about himself and his love life
5. BE A MAN, ASK HIM DIRECTLY.. lol