why cant I develop feelings for anyone?

Megan
I cant develop romantic feelings for anyone and it's really starting to get on my nerves. I'm still pretty young but I've realised that I've only ever had feeling for one guy and no one else. I want to be in a relationship and I want to be able to fall in love with someone but I just can't, the feelings never come. It's just so frustrating and I'm starting to lose hope in ever falling for someone. Can anyone help me figure out what's going on? (Although I can't experience romantic feelings I do experience sexual attraction)