I feel like hes still my property,even though we split up months ago and even though i have a boyfriend?

Theres this boy, and to be completely honest, he was my first proper boyfriend that i could be myself around and that, i was the first person he got in with too, thats not really important but we did really like eachother, but anyway, we split up like 3 months ago, and i have had a boyfriend since then but he wasnt very nice a complete user, but now i have another boyfriend who i like, and we've been together for a month. and nowww, my friend had a boyfriend who had been together for 5 months, then split up, she says to me she still loves her boyfriend, but my ex, totally wants to go out with her, but she completely leeds him on,says that she loves him to him [ i confronted her about it and she said nooo i still really love *dan* [her ex], i told *bob*, i loved him cause he wouldnt stop bugging me, hes so obsessive, i know it wasnt the right thing to do blah blah blah. but in school she holds his hand, like yeas, theres a girl holding her hand the other side or w/e, but still thats really badly leading him on? see what i mean, i act like i dont want her to do that to him cause it'll hurt them, but tbh, i think the reason i dont like them doing it is cause i hate watching. :( :(