Desperate for sex??

I feel so desperate like I always ask him and he throw it to the side with a "I'm sleepy" "I'm not in the mood" or just "you'll get it soon" when we first met I NEVER asked him he'd always ask me and every time I tell him I'm not going to ask anymore he get pissed but he never does anything with me. I send sexy pictures to get him in the mood I offer just to give him BJs and Boom he's to tried or a weird excuse😩 Does it seem like I'm begging or should I just stick to what I said?