Hinder - Without You Lyrics Meaning

I think it's about a guy and a girl that fight a lot and then they decide to take a break and during that break she meet somebody else and she's happy but he's not he sees them together and it's tearing him apartI think the part where he says you've been acting strange is because she's already seeing somebody else they fight for absolutely no reason I say this because I'm going through the same thing we haven't broken up but she starts fights over the stupidest little things that have no meaning and most of the time it has nothing to do with us she'll do things like coming home from work early and then jump in the shower which is really strange because it's out of content and this is something she does in the morning she sets up meetings with friends which is again out of content I'm not allowed to come but then again on the other hand I can't even have a friend over to play guitars so something tells me that she like the girl in the song have something going on with somebody else that's my interpretation that's what I get out of the song.