lost boy

I have been friends with this dude for like six years. for like the last four or five months his has been changing and been alot more sectretev. i need to know if there is any way for me to resure myself that we are still friend. if any one has any tip or test for me to do.

Last year i met a girl we began to talk at school and them we strated to talk on the phone. that them we started to get alot closer. we would talk for hour and hour. When the new year of school started i had developed a cloes bond with her and had stared to have feeling for her. i want to tell her how i feel but i don't want to effect our relationship. To make thing worse today she got a boy friend and i don't know if i should tell her how i feel.