The reason why your paternal uncle will not look you in the eye coz he disrespect you as a human being. His mind is full of contempt towards you.

Do not engage with such person, under any circumtances unless it's absolutely necessary. Once you have financial stability, move out & associate with people who respects you as a human being. Hope this helps.

Last but not least, under no circumstances that you open up your feelings about your uncle to any other family members. Coz, he will get the wind of it & use it against you. Be well.