<human>: Can you succinctly summarize the text in 1-3 sentences?

This guy used to go to my school and he contacted me over social media and we got to talking and I gave him my number. So then we are texting and he's really funny and flirtatious and I think he likes me and he's tagged me in those lame pictures "tag someone who" and it's like "whose hot" or "your crush" so I come to think he actually likes me and I like him a lot now..or the idea of him. We texted everyday for almost a week. 

So recently we stopped. I look online and he's commenting on a girl who I know, who is younger than me, and asking for her number. So yeah I got really hurt. And he stopped texting me after that then he randomly tagged me in a picture saying "tag someone who is hot" and it's like why are you playing me like that? It's like talk to me or talk to another girl if you're serious which I'm concluding he's not. 

I messages him that I don't have a phone anymore and sorry on Instagram and he never responded. And just now my friend texted me if I'm over him which I say not really and she shows me a picture of him messaging her on Instagram asking for her number. Yeah I kinda broke down but I can't help it. I'm not that type of person to just flirt with anyone and play with people's feelings. I know I should move on but idk. I just needed to get it out.
<bot>: 19 year old guy came on to me but now is doing the same to other girls. I thought he really liked me but now I'm questioning myself and its really bringing down my self esteem.