If you find some you like and care about at uni, you can do both! But definitely use a condom!
And don’t do anything stupid like get engaged to them cuz way too young!
You need to date around, explore options and figure out what you like and don’t like in a romantic partner. And what you’re willing to put up with cuz there are times when they will drive you nuts and things that they do which you don’t like!
I would advise not getting married til late 20s at youngest cuz the probability of you being in a happy marriage with the person you will grow old with IF get married younger is VERY LOW otherwise since people are still figuring out WHO they are in their 20s and early 30s.