When a guy texts "oh," it can indicate a range of emotions depending on the context. It might express surprise, disappointment, or a realization about something you've discussed. The brevity of the response could suggest he is either unsure of how to continue the conversation or is feeling apathetic. To better understand his feelings, it's often helpful to consider the conversation's context and tone.
Oh Snap.!
Oh boy
oh please promise
It means the guy is really interested in speaking to you. The reason will not be known unless you ask him.
oh please promise
Oh my god... (gosh)
I'm a guy, and it usually means he likes you but is a little shy.
It means 'fat guy' in computer language. The phrase can also be translated as Murat or Ha.ha!
oh goodness gracious
He means your mean and he thinks you don't like him and don't want to talk to him
He's just not that into you.
he doesn't know what to say