Why would he give me his number?

[Lima]

Ok do heres the deal, I go to watch a soccar team play every home game n one day this guy started talking to me on twitter, I didnt actually recognise him but he said he sits a few rows in front of me in the stadium so I followed him back n we started talking on twitter n we were messaging, he put a kiss at the end but I didnt put a kiss coz i didnt want him to think I was like into him or anything, so then he stopped putting a kiss. Its always him that starts the convos not me coz i don't know wither he has a crush or not. Anyway at the soccar he never like turns around n waves or anything but his friend does, he messaged me one time to come sit with him at a game, I said I might if the people I talk to arent there but they were so I never went n sat next to him, then he's just messaged me saying this things a nightmare to talk on here's my number, text me. I didnt reply yet, in my head i'm like NO, I mean why would i wanna text a guy unless i'm into him or related to him or good friends, you know and also I dont know why he would gimme his number, he is 4 years younger than me, like why would a teenage boy be interested in an old hag like me or is he just being nice, what do I do or say????
*Ok so,
lol, idiot
He knows my age, at first he said he thought i was about his age cuz i do look kinda young but then he's all oh thats cool, i hang out with a lot of older people