dis doesnt happen to everyone la, cmon!
i knew my bf via msn too and we have been dating for 4 years plus now.

to TS:
dis happen probably because u ad ur bf is not to say understand each other too deep yet.
as u said, know each other on9, meet up and get together.
maybe the timing u all get to know each other better is short.
thus the weird feelings is all around.
u can try asking ur bf and provided IF he is honest enuf, he will tell u the truth.
else even if u ask or not, it makes no different.