Found out a good friend of mine had a birthday last week and didn’t invite me. We’ve been good friends for many years and a few days before her birthday I met her up with to give her presents etc and she didn’t mention anything about her plans. Found out that on her birthday she went out with her other friends and I wasn’t invited. She changed jobs this year so I understand she would have made new friends but the last few years we’ve always celebrated special events together.