I have been married to my wife for almost 2 years now and she made some bad decisions when I was deployed i.e.. Getting pregnant by another guy. We talked things over and decided to stay together, and I was just wondering if I raise this child as my own,which I plan to, if by some chance we separate will I be obligated to pay child support just for taking care of the child when we were together. There is no listed biological father for his safety, and we are residents of Texas.

If you adopt the child, yes for sure,

But just because there is no father listed, there is a real father, and they should be paying child support

But in the US, yes, there are some states where if you act in the role of father for some time, you can be responible for child support if you split

There are also some states that if you are married to the mother you are considered the legal father of the child and it cannot be contested. Hopefully someone with some expertise on Texas law will come along. You may want to post this question in the Family Law forum.

Let me ask this: the biological father isn't listed on the birth certificate for "his safety"? Safety from whom?

You need to consult a lawyer.

This will vary from state to state, and sometimes local laws come into play.

Let me just say this, though: Either you decide to parent that child, and to be his/her daddy, or you should just leave now. If you are not willing to have that child to be YOURS, your relationship with your wife WILL fail, and you'll be breaking the heart of a child the longer you wait to acknowledge your resentment.

PS--the child being YOURS means that you're going to be willing to pay child support if you separate from your wife later, because you love the child, and want the best for him/her.