LDR !! -_- (Long Distance Relationship)

Hye Guys I Really Have a Problem I'm dating this guy but we r in a different cities so i've never met him or heard his voice i think i like him the problem is i just don't get him like what? Like on his birthday Yesterday i wrote some wishing sentences on facebook he just like the status then he wrote a comm (. <3 <3 ..) some girl wrote at his timeline "sorry i just found out it's your birthday happy birthday my lovely ) and he respond by thank you pretty & he didn't send me the relationship request so it's like i'm his secret i don't know why a if i didn't talk to him 1st he wouldn't talk ! he's kind & i really like him but i can't do this anymore Please Help Me what should i do ? Thanks ! <3 ~Rhita