How do i act around my best guy friend that i like?

i'm a sopre. he's a senior and we've been best friends for the past 6 months. we talk, text, vc every night since i met him up until about 2 or 3 weeks ago. during the beginning of our friendship my cousin who he's also friends with and is also a senior told him and a couple other of my guy friends to stay away from me and not flirt with me anymore. but she got over it and we cont. to be close. i know he liked me before that so that's prob why she told him to leave me alone. about a week or so ago i started to develop feeling for him. last weekend when i was home all alone he drove to my house and we talked for an hr. then he cont to flirt with me the next couple days. i started to get my hopes up and decided id tell him this weekend. but then i found out he already knew.. through his best friend who im also good friends with. he said they had a talk about girls and my crush/friend brought me up. i don't know for sure how he feels about me since i was to embarred to ask his best friend directly even though we're close. but he did tell my that my crush/friend knew i liked him all last weekend. even though he didnt tell me how my crush/friend feelt about me he did say i shouldnt get hung up on him since he's a senior. which led me to believe that he doesnt like me. so i cried for hrs to my best girlfriend cuz i was hurt an a little embred. but just then my crush/friend hit me up and figured out that i was upset but didn't know why and of course i wasn't going to tell him. he starting going crazy at the fact that i was upset over something he imed me and texted me a million times even though i didnt answer and he talked to the same gf i cried to, asking what the matter was. i just don't know what to do. i like him but im not sure if he feels the same way and i dont want to be embred. should i tell him the truth? i can only avoid him for so long.. PLEASE HELP ME!