Mom or dad?

For years my mom makes excuses for everything. Why I can't hang out with people and do anything outside of the house. I'm the person who never gets invited to things because everyone knows I won't be able to go. 2 years ago my dad left my life almost completely and got married. I see him maybe every few months. I don't know where he lives but I know its close. My dad never yelled at me unless there was a reason. He used to go meet all my friends' parents and be super friendly while my mom hides away.

I keep thinking over and over that things would be better there. But I would lose my mom. She would never talk to me again if I called my dad and left.

I don't know what to do I'm crying every day I'm so depressed do I stay loyal to my mom because she's been there for me or do I leave to live with my dad? I feel she cares way too much and he cares too little.

(I'm 15 if you were wondering )