Is there something wrong with me?

Hello, I just got out of a long term breakup. I don’t know if anyone else feels this way but I feel like I don’t find anyone attractive anymore, I don’t feel sexual tensions with anyone. Guys try to kiss me and I just get weirded out, I’m 20 and I feel like everyone at my age is going out, having sex, and just living their best life. While I can’t even imagine having sex with anyone else. My ex he was my first and I felt very comfortable with him I always wanted affection and attention. Now that I’m single, I just can’t do that with anyone else I don’t feel anything and it isn’t even pleasurable. I don’t know what’s wrong with me I feel like people my age should be open to these things sadly I’m not like that I wish I was just so I can feel how they feel. I’m talking to a new guy and I’m starting to catch feelings but whenever he leans in for a kiss I back up and feel grossed out. I don’t know with my ex in the beginning I was the same but eventually all I ever wanted was kisses and hugs from him. But it took almost a year for me to be that way. I don’t know if there’s just something wrong with me or what? Anyone else? I feel so alone with this…