> dating advice, get a cat that sleeps with you because it cares about you. 

Implying that cats can care about their owners. Hehe, just kidding, I have four of them.

Anyway, I'd suggest that you only date when you are ready and you really like someone who returns your feelings. It doesn't matter what age you are, people tend to just "go" with people out of desperation and because that person has feelings for them. I know countless teenagers and adults who do that in my life and it always ends up horribly. Don't be one of those people.

It's also okay to be jealous, that's just a natural human emotion.

I'm sixteen and I'm in a relationship, though it's only an online one. It's lasted for about one year now and since it's generally quiet aside from our parents knowing, there's very little drama. So, it's not really about age: maturity, freedom, commitment and so on. 

tl;dr: Date when you find someone you feel like you can truly spend your time with, doesn't matter if you're highschool, college age or so on. Just be ready, know that bad things sometimes happen in relationships. Good luck ;o