Talking to another guy

So me and my bf have been having problems lately were always arguing and fighting and sometimes we just can't stand eachother anymore ! He says things just aren't working out and sometimes I just wanna leave . These past two days have been okay And we live together but we weren't  talking for a couple days and iv been talking to this guy nothing serious but jus talk and I feel like I like who he is and I don't wanna get attached bc he's in a complicated relationship and I'm still wit my bf. And I jus don't know what to do .