Guys help me. Why my bf is acting lyk dis??

My bf n me are in long distance relationship.initialy he used 2 talk wid me. Nw i hv nt heard hm 4 long time 2 months. He just text me sometimes. In the initial phase we used to talk for hours.but nw he seems 2 b changed. When i askd him abt his changed behaviour towards me he replied nothing its me who is exaggerating the condition. He says he loves me. I dnt y then he is behaving lyk disg i love him very much. He has become my life. I cant live without him.but his behaviour towards me is upsetting. In this holiday i told him to meet me. He said he cant as if someone wil see then we have to face prblem. Y he dnt think dat it has been 2 year since we last met.pls dear help me