Being tricked and hurt many times makes you have a trust issue, you don't trust anyone and prefer to be alone but your classmate always approaches you even though you've tried to ignore him

"It doesn't matter how rude you are to me, I'll continue to be determined to earn your trust."

He said determinedly while looking at you with sincerity, after all you still can't trust someone but it seems like he is really sincere. Maybe you should give him a chance