I’m extremely attracted to my bf

I know this is a random post but I thought I was somewhat asexual until I met my boyfriend. I would find people attractive but not to this level. I feel guilty sometimes how sexually attracted I am because I feel like l'm harassing him by being so dirty all the time but he's insanely attractive. My heart skips beats at thinking of his face. We are long distance so I just wonder if it's weird to feel such attraction despite us seeing each other until December. Maybe it's how he treats me that makes me feel so much more.