Ugh! I need help! i got myself into a mess and i am a wreak! Advice PLEASE!?

SHEESH where to start... well I've been dating this guy for about 3 months and so much has happened. we connected right away and about a week ago i moved in.... let me tell you about "robert" hes amazing. he knows exactly what to say and make me feel special , very good looking, doesn't drink or smoke,and seems to have plans and goals in life, he has a daughter that i have fallen in love with. Everything is to good to be true, I went through his phone (crazy I know) and found him talking to another girl.... I don't want to argue or fight just need out ASAP. I had my own apt before but rushed things before I thought it through and have no money saved for another damn deposit and i really dont want to go back to my moms house.... bleh! but i think i will blow up if i stay here pretending everything is fine i need advice what should i do!!!!!