crushzz

so im a freshman and I really like this guy [ he’s a senior] we chat a couple of time online , he teases me and stuff , he talk and tease me a couple of time in class too , he also asked me to help him on the test , but now he’s acting like we don’t even know each other . And I saw him talking to other girls he just met , and he’s seem like he’s havin fun w/ them [in front me] it’s sooo annoying !! and I caught him looking at me a couple of time during lunch . But when we walk by each other , we both keep acting like we don’t know each other . So what should I do ? my friends keep telling me to express my feeling , but what if he doesn’t like me back ? should I tell him how I feel ? and what should I do if he doesn’t like me ? please help thanx