Advice???

So for a while now I've been talking to this guy whos at my school and he wants me to have sex which I am sure I'm ready for it and we have done stuff before but I don't know if he's the right guy I mean I actually have feelings for him and I even told him Im in love with him. But some how it took him a while to say it back but had only said it once when he wanted to see my pussy in camera when I was face timing him which I thought he only said that so he could get to see my pussy and we we did stuff together like grabbing my boobs and me giving him a hand job, he told all of his friends at school and it became a rumor, he even promised me he would not tell anyone at all but lied and every time I say to him come shopping or come to town he always says hes busy but when I stop talking to him and try to move on he just won't let go and always says I can't talk to other guys but I've been told he has a girlfriend apparently and because of all this drama I just can concentrate on what to do no more and has made me so confused. Everytime I see him at school it's just awkward af and he never speaks to me like Never and is so different when he's with his friends. I also have a strange feeling that his ex who is well known hates me and chats shit. She also even made a group chat of her friends and me and him in it asking questions if I tossed him off. I felt so uncomfortable with the situation so he took me off the chat. Guys I really need help and some really good advice because I just dont know what to do I love him do much and had great memories with him but I just don't know what to do please give me advice it would really help and I would really appreciate it ❤️