I don’t know how to tell he really likes me? Help please !?

Karstan

So my main problem is I have been lied to many times before and the dude I’m with now is really sweet most of the time and sometimes I feel like he really likes me and others i don’t and part of my problem also is we have dated before but he just up and decided he didn’t like me one day so I’m scared it will happen again how do I know he really likes me and isn’t leading me on