Car co-signing

UPDATE:

Thank you everyone for your response! I DO NOT want to co-sign him at all and I want to get denied to be a co-signer. I even told him multiple times to not get a car he can’t afford even his own family said the same thing. We don’t even live together. I do not want to be stuck with a loan in my name at all. Even if we do end up married I will not co-sign for him. It’s the fact that he’s irresponsible and wants to show off.

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Hi everyone! My boyfriend is planning on buying a car and he needs a co-signer. I’m 19 and he’s 20 about to be 21 my credit is good but I just started working on my credit. I’m on unemployment and only been working for 2 years and I don’t make that much. My boyfriend is sometimes irresponsible when it comes with money. The car that he wants is expensive and he’s only putting 4K down and the loan will be at least 17k. I can’t even take out a school loan for no more than 6K from the school. I told him that I’m not going to co-sign him but do you think I’ll be denied to be his co-signer? I do not want to take any chances what so ever I just turned 19 last month and if anything happens I don’t want to be stuck paying off a loan that he can’t afford.