For what I see, it doesn't really matter. You both still talk, seems like nothing has changed.
If you really do feel bad about it, then go for it. Say you're not feeling alright with what you have done and apologize for your behavior. What's the worse that could happend? Maybe an awkward silence but you're showing you care and regret how you acted.
If not, then everything will remain as it is which doesn't seem that bad as you both seem to be getting along just fine after all.
It depends on how you feel in the end.