Talking about my boyfriend

Bi

So I have a relationship with this boy, in two days we will be 4 months to together; he’s basically perfect and I really love him but the problem is that my parents are not okey with our relationship; I don’t want to lie to my parents, nor leave my boyfriend... and something happened, we go to the institute together and they told us that we can’t be together and they are going to call my parents. So the issue is that I’m going to talk to my mother but I don’t know how to do it... please help