Bf upset over nudes

Hoping I could get some advice on this. My bf of 4.5 years and I have a great relationship. But, sometimes he asks me for nudes and I personally don’t feel like taking them. However, majority of the time I do send him nudes. Lately, though he’s been really pressurizing me into sending him nudes and when I told him that I didn’t feel like taking them because of work, school and fatigue, he started showing me a big attitude over text about me not being able to send him nudes. He responded with one word answers and left me on “seen” at times. So I explained to him that with his bitchy attitude he wasn’t going to get them anymore, since I had planned on taking a few just for the sake of his happiness. After I took a few and sent them to him, he started saying that the photo quality was terrible this time and that he was disappointed again. Ladies, has this ever happened to you. I’m going out on a date with him today and I need some advice in case he brings this up again. And also correct me if I’m wrong, but a lot of girls don’t always feel like sending nudes right? Like I have my good days and bad days...if I’m free and have a lot of time on my hands then sure, I’ll take some. But when you’re working one day and have 3 big assignments to finish for uni, the feelings towards nudes are completely different.. Thanks ❤️❤️