Husband advice

I need unbiased advice so I thought I’d turn to you guys.

I went to look at my husbands fb search’s out of curiosity (no bad intentions) and I found a girls name that he’s been searching for two weeks (a week after our anniversary)

I checked her out (he’s not fb friends with her).

She’s 17 and has a 2 year old, he met her because she has a college class with him (he’s 25) and they’ve chatted before.

I looked through his internet history and that showed he had also tried to look at her Instagram (it was private). He’s searched her 45 times.

I confronted him about it and he admitted he had a crush and felt guilty.

He’s even tried to reason saying because we’ve moved somewhere where neither of us has friends that the smallest bit of interaction made him have feelings.

I don’t know what to do or how to feel since I feel betrayed and cheated on (emotionally)

What would you do in my situation?

We also have a one year old daughter together