i get that too i just go to my room and eat by myself all alone
My brother is the same way. He always eats by himself.
You should probably get help with this before it really turns into a very serious eating disorder. Eating should be something that brings you together with family and friends.
How long have you felt like that for? Could be because your older and your father creeps you out,hahaha
may be because its not your turn
Don't quote me on this but it's probably anxiety, or some kind of phobia.