Yes, you can.
You need to be worried about the laws of your state. Boyfriend can't take you to another state to get married. First, it's illegal to take a minor across state lines without parental permission. Second, even if it wasn't, you couldn't get married anyway, because you're a minor without parental permission who is not a resident of their state.
Not without being a resident of the state, and, to be honest, you wouldn't want it anyhow - get pulled over in any other state with Colorado plates and/or a Colorado license, and they're going to come up with an excuse to search your car, thinking you have weed in there.
Within the USA it is not legal to marry your first cousin. It doesn't matter what state either is a resident of.
Unless you have parental, or legal guardian consent, a minor can not marry in any state of the U.S.
No.
No. Every state requires that a person be at least 18 in order to marry without parental consent/court order/special circumstances.
No. If the couple are residents of a state which makes exceptions in the case of pregnant minors, they may be allowed to marry if they meet the requirements and in some cases receive approval from the court of jurisdiction. Minors cannot leave the resident state with the purpose of being married in another state that allows the act without the permission (usually the accompanyment) of parents or legal guardian.
true
If you're in the US, the only thing that matters is if it's allowed in the state where you are a legal resident, because even if it were allowed in another state, you couldn't travel there and get it done (they wouldn't marry you). Check the laws of your state.
The drivers license from your home state of residence is legal as long as you are still a legal resident of that state. If you become a resident of the state of Texas (other than being stationed there in the military), yes, you would.
18 to marry without parent consent. 16/17 can marry with parental consent.
Each state have their own laws regarding marriage. In most states you have to be 18 to be able to do it without parental consent. With parental consent you can marry at 15 or 16 depending on the state and in some states you can marry at 15 without parental consent if you are pregnant or have a child.