He’s confusing the heck out of me

Mayra

So I have known this guy since we were in 6th grade we are seniors now. I actually never liked him but he likes me in 8th grade, but I really take it seriously. Now I like him but he’s giving me mixed signals back. He tells me how he’s always third wheeling and that he really wants a girlfriend but then when I start flirting with me he doesn’t talk to me like in 2 days. Should I tell him I like him ?