well i am in this fix aswell so i will tell you what i did, first try to talk to him and try to give space to the ex and if she wants to reuin life well slap her. but he might still like her so just be carefull at waht you do so play it smart!!!.
he sounds like a jerk to me........cause no boy should ever tell a girl they like her and then get back with his exgirlfriend. Don't worry about it. He just wanted a girl by his side so he could get his exgirlfriend jealous. One way or another, he still have feelings for his exgirlfriend. I don't mean for you to get upset or anything, but its just the truth and your better off without him................just walk past him in the hall with your pride and he'll know that he messed with the wrong girl ;)
The only way you would know if he still likes her is if he is constantly talking about her during the time of your relationship with this person. There are other ways he could still like her too. Still has her phone number, she keeps coming around him, stares at her most of the time, keeps anything of the past like pictures, gifts, etc. He would rather hang around a place where she is near. Here are some few suggestions, but there could be other reasons the only way to be really sure is to ask him out in the open about his exgirlfriend and if he still feels anything for her.
If he's still hanging around or dating you then he still likes you.
he still likes you but he might just not be ready to have a relationship
He could mean if you still like each other
I am sure that the guy will say yes he still likes his truck but he would like a new one with not payments....
the guy is probably shy. don't worry about it. or maybe he is just embarrassed.
if you still like him and he still likes you, GO FOR IT! nothing should be in your way
Move on!
You should tell the guy who likes you that you don't like him, but not until you ask the guy who you like if he likes you.
I guess she still could like the guy, but if she is looking for a relationship with a guy, she might want to think about moving on to bigger and better things.
Say nothing and dump him