This is what always happens:
1. Friend only needs money because they are irresponsible.
2. They fully intend to pay you back. It's not like they're planning to steal your money.
3. So they get your money, use it for whatever, and now they're broke again. Why? Because of #1 above.
4. Since they're broke again, it's hard for them to pay you back. They pay you small amounts here and there just to show they're trying. And in their mind they'll totally pay you the full amount when they "come into some money"
5. They eventually struggle so much that they can't even make the small payments anymore. Why? Because #1 above.
6. You start politely asking about the money. They say they're struggling but they they'll pay what they can. You might get a few more small payments out of them but they'll eventually stop paying again.
7. Now you're getting frustrated. You pester them about the money. You argue about all the things they're spending money on instead of paying you back. They say, "fine, Jesus, I'll get your stupid money if it's so important to you."
8. Maybe they make one more small payment then stop. You try to harass them some more but they stop returning your calls. This is the point where their intentions change. Up till now, they still intended to pay you back the full amount. But now they start to think "Man that guy used to be cool but now he's a dick."
9. They decide they don't want to be friends anymore.
10. Since you're not friends anymore then they're not going to pay you back. Why would they? You're a dick now in their minds. You don't deserve their friendship or money. Besides, you're not hurting for money. You obviously are doing well if you can afford to be loaning people 11k. So fuck you. Go swim in your pile of money, Scrooge McDuck. I'm done with you.