Yes when we lend money to a friend, we will expect them to help us when we are in needs and not just a verbal gratitude alone. Based on my life experience, these "friends" will never help you in return. For example, when one is hospitalize or a kin had passed on. These "friends" will find excuses not to visit you in hospital or attend a funeral of your relative. For my situation a decade ago that is "friend" only take care of senior management people in the society and not you.
So I learned never lend money or invest anything with friends, another long time friend of mine who earn about $15,000 as sales manager told me that he only provided a basic living for his wife and kids no other luxuries at all. He never buy me a coffee despite knowing each other for 20 years but he helped to be my character referee.
Also never go with big spending with friends, examples will be high end KTV nightclubs or expensive restaurants because nothing come good after all these spending