Is this normal? a little advice please!!

Alright so I'm starting to know this guy from work, a total sweetheart.Kissed a couple times. Here is the thing, I'm losing interest and I don't want to hurt his feeling but I have never dated in my 19 yrs and I'm thinking that it might be my fear of starting a relationship or that maybe I'm not sure of my sexual orientation... Please Don't judge😐