I need advice!!

okay so hear me out. theres a guy ive been friends with for not too long, js since summer break so maybe a few months. hes a good enough friend, but i have absolutely zero romantic interest in him. here's the thing, ts guy is lwk rich, so he takes me to lunch sometimes and he'll buy me a monster here and there bcuz he has plenty of money. ALSO, his mom has been giving me rides to band camp for about a week because my car was broken and I couldn't afford the part I needed to fix it. so he's been doing alot for me, and I almost feel like i owe him in a sense, but ts guy wants a bit more than I can give him. hes into me. romantically? maybe. Definitely sexually. he acts like he wants to date me, but i don't get it because he barely knows me. anyhow, I have told him on many occasions I wont date him, but he wont let it go. so here's where things get interesting. hes been asking to hang out alot recently, and he also made the impression that he was finally okay with just friends. he definitely wasnt. maybe its my fault because I do tend to have a naturally kinda flirty personality so maybe I was js giving the wrong signals? idk. but I was going to watch the Spiderman movie last Friday in theaters, and he asked if him and his mom could come with. hes done so much for me so I figured why not, but when we got to the theater things got wierd. he was grabbing my hands alot and then TWICE he grabbed my inner thigh. I ended up going to the bathroom to get away but I didnt know how to tell him to stop because I was scared of making things awkward or something. anyway, we got in an argument bcuz he said I was giving signals and i shouldn't have let anything happen because I gave him false hope, even tho I previously told him I didnt want a relationship and he said he felt the same way. my cars fixed now and I can drive myself to band, but hes still been texting me and things wre just wierd now. what do I do? 😭😭