Boy trouble , help pleaaase!?

okay, so i am head over heels for this one guy. i think he likes me not to be y, but then i dont know why he hasnt even talked to me yet. i mean he has my number so he could text me but its been a month and we havent talked . should i text him now, or is it too late because like i said it has been a month . or should i just wait for him to talk to me ? we sorta had a thing on the last week of school, like i mean we we're sorta flirty towards each other, but im afraid thats all nothing to him now .. help? :(