So this girl and I aren’t dating but we’ve been talking for months and are pretty exclusive. Recently this girl I’ve been friends with for years started talking to me in that way. I’ve just brushed it off and told myself I wasn’t going to act on it but lately the girl I talk to hasn’t been communicating much and I unintentionally give my time to this new girl and I’m starting to like her
The first girl might have gotten bored of you and started talking to an 'other guy' as well. That would be funny.
you don't owe anything to the first girl, you're not with anyone - speak to whoever you like!