Bangchan || Credit card

Bangchan has been your boyfriend for a year and a half. You love him a lot, although there are days when you barely see him because he often leaves the country for work. However, he's always looking out for you. You have your own life outside of your relationship with Chan, and he loves that you're so independent, though he always gives you gifts and little tokens of affection even when he's not in the country or city.
A month ago he gave you an extension of his credit card, with no limits, and literally told you, "You can buy whatever you want with it, if you want something expensive just use it," but since he gave it to you you hadn't used it, you had accepted it because he insisted, but you didn't feel comfortable spending Chan's money.

~~

Chan had left the country a few weeks ago, it was night and he took advantage of his free time to call you, the topic came up during the call.
"By the way, babe, I got the credit card bills, haven't you used it? Are you having trouble using it or something?" I ask you from the other line.