While I'm in math class he keeps running his hands across my shoulders/arms, poking my ribs, and putting his head on my shoulder while I'm doing my work. It makes me really uncomfortable, but I feel like I may be overreacting? He repeatedly tells me hes asexual, but I feel really awkward, especially because hes "accidentally" touched my breasts before. I don't know how to get him to stop. Ive told him politely, but he continues to touch me throughout the whole class period. When I walk around campus he puts his arm around me which also makes me uncomfortable, and I don't know how to tell him I don't really like physical touch without hurting his feelings. What should I do?