jimmy, I do believe you have already made up your mind before you even posted over here asking for our opinions. The only thing you're seeking here is that we change your mind and perhaps give you a good enough reason for not doing like what you have in mind.
With that said, if you're afraid that your friend might use it to gamble, then ask her directly what it's for and if it's for gambling or not. If you have a true enough friend he/she will surely tell you the truth no matter what it is.
Only borrow the money to him/her if you can afford to lose that money and still be well with it. But if that money is important to you and that you really do need it and can't afford to be without it, then don't borrow it.
You win some, you lose some... nobody can win it all.
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