Possible love interest???

Amy

There's a guy in the place where i work and hes always been flirty, he's a naturally flirty guy. Ive known him for about 5 years and I'm just out of a 2 and a half year relationship about a month ago. Me and my ex still talk but he got with this other girl a day after we broke up but they say they aren't officially dating. Anyways, this guy has been a little more flirty with me lately and people have picked up on it but what do I do? Last night we were both working and at the end of the night he was showing off and in a room of about 7 people he only shouted my name so I would look. Help!! Do I keep flirting and see where it goes or am I just overthinking the whole thing?