Boy trouble need advice

So for the past 4 months I️ have been seeing this guy who i️ really like hit he is in a complicated relationship with someone else at the same time. I️ know of the other girl that’s it he told me they don’t see each other at all anymore and he sees me more but i️ don’t know what to do some people tell me to stop seeing him and others say so what makes me happy but i️ don’t know what to do anymore because i’m scared if i️ make him choose he won’t choose me even though he told me he likes me. HELPP