Hello all, thank you for your replies and I'm sorry I didn't come earlier. Just to make things clear, my mother thinks that I'm too young to have a sexual relation, I have to wait at least one more year and my boyfriend knew that all the time. We spent time together, but I know that is hard for him.
So, after a week of talking with my mother and boyfriend I had to break up with him, because my mother considered that I need to focus on my studies and I have time to have a relation after I finish college(that will be in 4 years). On the other hand, my boyfriend didn't want to continue unless she changed her attitude towards him and to show him some trust. I can't please both of them, that is why I had to end everything.