There's this guy I've been sort of flirting with from afar for a while now, as we only see each other in passing, and he's always been very outgoing (visibly checking me out, smiling, winking) and just recently we've become more chatty. This week we had a conversation, during that conversation some personal details came out and now I feel he's different with me.
Before, he'd always be looking at me first when I look at him. He'd always try to catch my eye, and was very smiley. Since the conversation on Monday he's not caught my eye, there'd be chances we could talk for a few minutes but he'd say he needs to go and shut down a chance to have a small chat. I don't know if he maybe feels differently and if I should back off or am I overthinking it?