I like this guy, how can I test if he's interested without coming on too strong?

[Wondering Woman]

We met 2 mths ago when I was visiting friends in his country, loads of attraction, so were inseparable for the last couple of days I was there. Last words of his as he looked in my eyes 'see you in xxx (name of my city)'. He also told me to come back to visit. So we've been emailing & chatting a bit...A few days ago, I told him I'm thinking of travelling (& one of the countries is his) & said to him 'you're welcome to come'. He replied 'thanks for the offer, but semester starts just then'. I wrote 'too bad, I'm travelling when you're studying'. Didn't hear anything until today when he clicked that he liked a Facebook photo he had taken of me (when we met). Do you think he's interested in me

 

[Sabine]

yeah he likes u just test him like try to flit but dont be the 1 thats tooo flirty like im want to sleeep but i cant :S or smth like that ....... see what he replies or maybe open an nw fb and make him add u (dont put ur name) then ask him if he like sm1 or is he in a relationship and if he want to meet nt u but the nw fb girl that is u but he doesnt know and just ask anything but then when u get bored ask him if he knows u as the real u and then say that the fb girl(u) is ur enimy and that u hate u and then see what he replies if he cares he will block her if he doesnt give a shit abt u hell continue talking to u (fb)