I remember when you posted about him being flirty and you weren't too keen. That's the way with life and our fickle emotions. Something makes us uncomfortable but we grow to like it, and then when it stops we want it back. He has possibly just taken the hint - you weren't interested and he's moved on. You can either accept that and move on yourself, or you can talk to him. Tell him that although you weren't happy about the flirting at first, your feelings have changed and if he is still interested you'd like to see how things go. I know it's hard, and you're taking a risk that he'll reject you - but at least you'll know where you stand, and if he's not interested you can get on with forgetting about him. If you don't take a chance you could miss out on something great. Oh, and ignore sqad - its a long long time since he was a 15 year old girl ;)