<human>: I love my girlfriend a lot and I know she feels the same way back. Lately I've been stressing heavily over some of the red flags that I have noted throughout our relationship and I need advice on whether this is worth continuing or just better to end it now.

Major red flag - 6 months into our relationship and out at a gay bar with her and some of her friends. This gay guy begins talking to the group before eventually starting to hook up with her for about 5 seconds. I got mad. Next day she apologized profusely saying she was drunk.
More recently I read messages to an old ex saying that she can't meet up with him when she went out that night because shes afraid she would be drunk and kiss him. 
There is also a guy friend she insists are only mates, yet recently she deleted their text message conversation which was unusual but I didn't bring it up because of feeling over-controlling.

This is my first major relationship and 99% of the time we get along great, I love her and suspect I may be just trying to block out these red flags but am not sure. 
Are these trust issues I'm feeling worth bringing up and discussing with her or is it too late?

Any advice/experience will be greatly appreciated, Thanks!

Can you condense the text into a few key points?
<bot>: Noticed red flags which has ruined my trust for my girlfriend, is it worth bringing up and trying to salvage the relationship or should I just end it now?