How to let go?

So I’ve been in a relationship with my boyfriend for almost 2 years and I love him with all my heart.. he has to move out of my state. I can’t go with him bc I don’t graduate until May and I refuse to do long distance bc he’s given me reason not to trust him in the past.. my family will be disappointed and disown me if I chase him up there when I graduate but I want to be happy and he is what makes me happy.. how do I let go of everything I ever dreamed of?