The requirements in your question are unacceptable, and you are willing to do the following:

1, you and your boyfriend are not officially married, you can't handle it.

Even if you and your boyfriend are officially married, you still need your boyfriend to get you a supplementary card.

I suggest that you pay in installments after you buy it, so that your repayment pressure will be less. Only a few hundred dollars a month.

I hope the above answers can help you.