<human>: (Throwaway for obvious reasons)

When I'm with my go things are (mostly) great, but it's when we're apart I start to feel insecure. While her best friend is a male her ages and she's SWORN to me she'd never cheat, I can't help always feeling second best.

When we talk on fb chat, I'm always getting abrupt and 1 word answers, while at the same time she's having lengthy conversations with him from the minute so goes online until she goes to bed. Recently she's also told me she's going offline to do things, when in fact she's just appearing offline to me and continuing conversations with him.

I come back to when I actually see my girlfriend - she acts normally toward me but is constantly texting him throughout the day. Even when we're actively doing stuff together :(

Could you distill the essence of the text into 1-3 sentences?
<bot>: Girlfriend is always making me feel second to her best friend. I know there's no physical cheating going on but feel really insecure that there' something emotional going on :(