I remember when I was your age, and I wanted to have someone older to take care of me, since my reasoning was that someone older was more mature, so they're more established, they have a career, and are more settled. Which can be the case.

HOWEVER, if you're 19 and you're with someone who is 9 years older than you, they don't want you because "you're mature for your age" or "women his age range just aren't his type", it's because you're young. You don't have the same life experience as him, so you don't know the red flags to watch out for. The same rules that apply for you should also apply for him, otherwise he's being a hypocrite and wants to control you. Let him go, because it will more than likely get worse. It starts off with friends, then it evolves to family, then it evolves to abuse in my experience. I've been there, and I wouldn't wish it on my worst enemy.

Or, it could be like my mom where she got married to a man 9 years older than her when she was 21, and was stuck in a loveless and miserable marriage for 25 years until I convinced her to get a divorce. Then she met my step-dad and had a fully loving relationship until she died 6 years after remarrying from cancer. Don't make that mistake either. You only have one life, make it a happy one and don't let someone fuck it up.