Can my childs mother actually keep me from seeing my child. The split is due to infedality but we weren't married.

The State of Texas has a strong public policy that BOTH parents should participate in raising a child, whether they are together or not. Assuming that you don't have any major issues with criminal activity, drug use, or violence, most Texas Courts will allow you to spend time with your kids, even if their mothers don't want you to. You need to remember however, that family law is very dependent on what the particular judge who is hearing your case thinks should happen. You need to talk to a good family law attorney in your area to get details on what may happen in your situation. And you don't have to wait for them to take you to Court. You can file first, which makes you look better to the Judge, and see your kids sooner.