Heeeeeellllp ! So confused

Susan
Could anyone help please i've got this problem with a friend of mine , i know him now for 7 years his sister is my best friend and he studies with me in university ! Last year we got closer to each other then ever , and i felt he liked me with the little things he used to do to me and show me like , cheek kisses , hugs , he used to lift me up , tickle me and so on ! He always knew i had a crush for him and he told me to change physically so he could be with me in relation but 6 months ago when our classmates found out we like each other they kept embarassing him and kept lying to him that i said things i never said , now he doesnt talk to me ! Please could anybody help i've tried talking ro him 2 times but he changed completely towards me but keeps staring at me in class !