I'm married but ...

I am 27 years old and married to a really.good guy , we have a beautiful daughter who is 9mos old , now i have been talking to another man whom by the way is younger but I've met his mom already n they are planning something for us already now during all of this I've gained feelings for this man and my hubby is out of town half of the.month and is getting to where every time he comes home he picks fights with me .. I am seriously thinking about pursuing this other man am i wrong for this ... What should i do !!!