I Am Confused About My Feelings

Im just a little confused .-. Yesterday was my ex gf's birthday nd i used to always wish her ... nd as that day kept coming closer, i kept getting more nd more tense as to do what i am supposed to do :/ i feel like a bad guy for not wishing her ... bt then again, im not her bf ... not even a friend actually .... i dnt talk with her at all ever since then ... i guess it was the right thing to do ..idk really... @_@ wat a mess !