Weird friend

Usually I spend most of the weekend with my one friend (Jenny) just doing hw but this Saturday I went out with my other friend (Sally) for the whole day to look at Christmas lights. Jenny ignored my snaps for 3 hours and then 4 hours and her snap score was going up etc. I thought jenny was mad at me so I asked her and she said no she was just busy today. I didn’t bring up the snap score but she also lied about sending me something that was talking about plans and was detailed that sally supposedly opened (sally said she didn’t I believe her). So I just don’t know how to feel like what’s happening? She gets defensive and I don’t want this to be a whole things but I’m so confused