Doubt and anxiety

I'm a 19 year old christian studying at university. I have a really ideological teacher Who hates christianity and Always tries to debunk It during class. One of his lessons created a very strong sense of doubt in me, as well as tension.

I'm fighting with doubt now, and It causes me a lot of anxiety and it's eating me alive. I try to find answers, but as soon as i start searching i feel a lot of anxiety, i don't end up finding the answers and i leave with more anxiety. I really feel paralised and i can't find the answers, and the tension Is eating me alive i can't handle It. Please tell me What to do, i'm really struggling and i feel like i'm losing Faith and like God doesn't love me anymore, like he Is distant.

P.S. : The doubt Is about homosexuality and What should christian Who are Born gay do (i'm heterosexual).