No, once you do your relationship will stand a good chance of changing for the worse especially if your friend is slow to pay, only partially pays, or never repays.
I recently read a story about a woman who makes over 6 figures a year and bit by bit, friends and family approached her for money. Now she pays bills for her friends and family and it is now her that is suffering financially, on SIX figures. She is single and has no kids. Friends are friends, not children with an allowance. And family should be considered friends (only) when they want you to lend.