Is it normal to be this unstable during puberty?

I've been focusing on my career, studies and hobbies for several years but suddenly after the major exams had come to a finish, I started feeling a need to be in a relationship. So I tried building a relationship with this girl but when I asked her out she said no, which I'm still a bit hurt about after several months. I don't really want to be in a relationship and would rather just focus on my studies but there's this weird feeling of really wanting to have sex and be in a relationship with the opposite sex. I'm not sure what to do to be honest since this feeling is weird. Is there anything I could do to stop this feeling?

Is it normal to be this unstable during puberty?
Post Opinion