Does he like me or is he just a flirt?

so it all started yesterday at the carnival wit my friends i was gettin on a ride when i saw my friend shantel i said hi to her and sat down waitin 4 the ride so some ppl where talkin she friend keyon was like r u scared and i said no the ride started it was fun and i got off it and started talkin wit her and keyon and me and him got along well then shantel asked us to go on the zipper the scariest ride a the carnival and we all got on but it was only 2 ppl at a time..after we all got off he was makin me laugh and tell me that his fone almost fell out and stuff then we got on the first ride again but i was sittin wit his lil sis and shantel was wit him we where right across from each other and her and shantel asked us if we liked eachother and we was like just as friends and from what shantel tells me he asked 4 my number on the ride but at first i didnt but he asked me and i gave it to him and we was walkin together the whole day and we was talkin and he said he wanted to get to kno me better and stuff soo later that nite i texted him and he was tellin me stuff that sound a lot like me and i was think i mite like him and today i notice he acted different around me like idk really but i think he mite like me but idk bcuz he has a girlfriend and idk i need help im only 13 and hes soo sweet and nice and a year older then me help plz