"For some reason, when I'm around you, I'm not, careful."
Is there a difference between "when I'm around you" and "when I'm with you"? Thanks for your help.
Either are acceptable (though the last comma should be taken out). There isn't much of a difference between the two, but "with you" implies a stronger connection. It is more intimate. However, I would use either in normal speech.
When I'm around you, I feel happy. / When I'm with you, I feel happy.
I'd probably say the first to a friend, and the second to a girlfriend or a very close friend.
captal