Relationship Question

So I have been dating my current bf for 2 years now and I love him a lot and plan on marrying him (I’m 18 he’s 21). But I work with a guy and we went on a work trip, and he seemed to be a little flirty which I didn’t mind for some reason and now I feel like I might like him (he’s 23). Idk if I actually like him like that but I really enjoy spending time with him. It’s just such a weird feeling because I love my bf so so much and just wonder if this feeling for the other guy is gonna fade. Or if I’m just scared because of talking about marriage with my bf since I’m so young and now I’m just trying to blow it up because I’m scared. What do yall think?