Search Results: too tight

So I rounded up some friends to go on a trip. We each owed $40 each. So I messaged 3 days before to see if everyone was on board, they said yes.
There's friend a , friend b and friend c.
I text friend b when will we reserve the trip.
She stated she gets paid tomorrow and will venmo me. I told her ok me too, I'll wait until you message and then I'll book it. Keep in mind I'm on a tight budget and slim income.
FriendB messages me and says she gets got paid. Will I book it so she can venmo me.
I said okay yeah let me go ahead and book it now since we are ready. I booked it and paid for everyone and sent the confirmation to everyone.
Friend C texts saying she can't go all of a sudden even when I asked a few days before. :) I was annoyed but I said ok it's fine. Friend A sent her portion of the money.
Friend B states cool, I just got a new card so I have to put it on my venmo I'll pay you later. I was confused.. Then she states oh I can't pay you because I don't have my new card on my venmo yet. So I'm like ok? Well just pay me when you put it on~
So 2 days go by and I look at her social media... She is going out and going to restaurants. Granted I don't know what payment form she's using so I can't assume.
However it just doesn't sit right that she says she will pay me then but changes it to later. If I owe someone something, as soon as I get the money I give it right back. Also the fact that it takes less than 5 min to put your card info... On venmo. I'm stressing over here and wondering why isn't she sending the money.
So I decided to just get a refund for part of the trip and told friend b. "Ugh I'm sorry, they already refunded me part of the trip since friend c cancelled, if you want to go you can put in an order still! . That way my money isn't in use and I won't have to worry about people owing me.
She replied within a minute and said no problem.
I know never to do money engagment with friends with my own money anymore.
Have you ever experienced that?