My bf asked for a large sum of money

I inherited about 50K $ from my father. My boyfriend knew. About a Year later he asked me for 9,700$ to buy a new car. He said he will return the money within a year. What should I do? I really don’t feel comfortable giving him the money. He’s not my husband. We’ve been going out for 7 years and has no intention of marrying me. But he treats me nicely and always supports me. My inheritance is the only back up I have in life. I have no family left. Anything goes wrong I’ll feel devastated. Please tell me, am I being cheap? Also I’m currently unemployed but received a job offer of 2000$ monthly. Which is not enough but it will help me until I look for something better. Appreciate any advice . Thanks .