I have a bf
But i was alway sad
'coz I do not know where the relationship with my bf would lead to
then i met him
I like him as a friend , and i always attracted by his speech and his act.
Someday he looked into my eyes
And asked me to be his girlfriend
I turned him down
'coz i do not think i could betray my bf
I have already betray my bf
I already fell in love with him
Your first relationship doesn't sound promising... It sounds like it has problems and you are two different people. Maybe there is a big difference in interests, goals, intelligence,... who knows. In this case you should not be boyfriend and girlfriend. You should think carefully and if this is true, if it is you should break up with your boyfriend.
I think it is very bad to fall in love with another boy when you have a boyfriend. This is not good behavior and you should not get used to it because you will never be happy with one person and will always look for new people. However now you are in a difficult situation... one boy provides no future and the other you are in love with. I would suggest that if the relationship with the first is bad and not advancing then it needs to be finished. However after this I think you should be single for a while and friends with the new boy... If the feelings grow then you can cultivate a new and successful relationship. Good luck :)