<human>: I need some external guidance.

For context my GF lives an hour away we both work so her coming to the city to join us was not an option yesterday, plus she is coming over today.

My GF texts me what I was up to I say that I was thinking about the trivia night but I might not because I was lazy. Anyway I rallied and joined my friends at the bar. I did not drink or eat anything and was there for maybe an hour then walked back home. I continued the text conversation with her but forgot to mention which way I landed on the going out thing.

Today my GF asks if I went to the trivia night and I say that I did and she gets very mad at me for not telling her that I went.

I have not dated for very much but I feel that me giving her tabs every time I leave to hang out with a friend is excessive. I know there is a line that can be crossed, late night dinners with ex's are obviously wrong but where is the line?

Condense the text into a few key points
<bot>: When you are in a 4 month relationship is it necessary for me the BF to tell the GF every time I leave my apartment to hang out with friends for a quiet night for 1-2 hours.