As someone who married at nineteen way back in 1974 and has 2 married kids and 4 grand daughters, I would say it needs to be done with reverence. It is true I probably married to escape my homelife but we have a very strong commitment to each other and to the importance of the covenent involved.
I think the biggest problem with marrying early is missed growth. Very few teens that marry wait long to start having kids. Kids make it harder to grow together as a couple and as an adult.
Finally as a teen you live more in your emotions and marriage is a commitment and doesn't make you feel good all the time. This leads emotionally immature (of all ages) couples to bail out thinking it is a mistake- that they chose wrong.
In short, don't rush it you need to know him and yourself well to make a commitment and you need your family to make it work