Should i just stop talking to him?

I have been talking to this buy recently and it started off great. We would laugh, flirt, he would say sweet things to me like i was so pretty, adorable, and that we had a connection and he has no felt this with any other girl since he last gf enough to date.

These past few days he has been in contact, but all the cute comments have gone, and he can seem a little snarky, although he does initiate contact. He is still saying about getting together (tomorrow), but it just doesn’t seem like it was before when he was excited to hang out and said he couldn’t wait to see me. I wouldn’t be surprised if he flakes on tomorrow at some point.

We will be talking in conversation and then he will randomly just stop replying, so i don’t send anymore….then he might come back the next day and start a new convo, but it kind of bothers me how he just disappears like that. When we first started talking he would say if he was going to bed or whatever.

So my question is should i just tell him i can’t make tomorrow if he does mention it again and just forget this guy? I liked how we were being before, but his behavior changing is starting to make me wonder if he has some kind of game plan.