Should probably name change for this as it's outing but meh. My best friend is a single mum of 4. She works really hard but lives week to week.
She had regularly borrowed money from me for the last year or so. She always pays it back on time but I am starting to feel like a human ATM.
This morning she messaged me "happy birthday! I will pop a card over later. Btw, could you lend me £200? I need to get car sorted and can pay you back £100 next Friday then £100 the next week. See you later! xxx"
I'm raging. DH says I should just let it go and she always pays us back so what does it matter. 
AIBU to just text back to say no, we can't lend this time?
Seriously, I'm livid!