<human>: Hello everyone,

This is my first time writing although I've read many past posts. 

I would like to start by saying that I do love my girlfriend very much. We've been together almost 3 years and things have been mostly good. 

However, things went upside down when she went on a trip about a year ago and did things that mutually exclusive couples don't do. I was torn apart, but she convinced me to give it another go.

Ever since I've been insecure about our relationship especially when she goes out and parties. My mind wanders really easily and when she doesn't reply and text back I have a hard time not imaging the worst. 

Fast forward to present time - she is going on a trip again and I'm terrified that something might happen again. She seems to get lost in the moment a lot, while I don't think she means to, it does happen. 

We were both pretty young and inexperienced when we got together, so new things, people and environment probably do excite her. They excite me too.

Could you distill the essence of the text into 1-3 sentences?
<bot>: girlfriend did something she wasn't suppose to. Not sure if I trust her since. Going off on trip again, feeling insecure.