<human>: Yesterday I opened my gfs phone to go on youtube because mine was broken and a message pops up from lets say Steve. and Steve says I cant wait to have you in my arms. So obviously im suspicious, I check the rest of the texts and they are back and forth flirting saying things like Ill be dreaming of you and I really like you. So I wake up my girlfriend and ask her about it.

She tells me its been only going on for a week, as if that is supposed to make me feel better, and she says they haven't done anything just flirting. 

After a long talk she tells me that she assumed I knew that we had broken up months ago and were just living together as roommates. 

I asked her if she was going to tell me about him and she said eventually.

She says she feels bad about it and the next day at work she supposedly tells him its not going to work between them. 

I am now in this position where I have to move back into my mothers house and try to find work because I was a stay at home father before all of this and I cant get this out of my head.

I cant sleep at night without seeing those texts and I'm exhausted.

Could you distill the essence of the text into 1-3 sentences?
<bot>: Girlfriend cheated on me, I cant get these memories to go away, and I'm afraid she is going to jump into another relationship as soon as I leave like she always does and It wont be healthy for our son....