Does he like me back?

So there’s this boy I talk to all the time and he is talking to some girl but he comes off as flirty to me I just wanna see if he likes me back bc I have developed feelings for him but im obviously not gonna tell him since he’s talking to another girl.

It doesn't look like it.
He/Moon separates from you/Saturn. And there is no reception from him to you.

In addition to what IleneK wrote, moon approaches the conjunction with Jupiter of your 3rd, so he does like to flirt with you, but that is the end of it.
No relationship.