it was more exhausting to pretend he was invisible but i'm getting kinda tired of pretending I don't care about him much and I don't know what to do

I think sometimes that going against your nature is the worst thing that you can do, if it’s in your nature to love a person deeply you’re going to do it regardless of how they treat you. So I guess what I’d tell you to do is to just keep loving and caring for him until you run out of love and then never go back there again.