I agree with Richard.

You're trying too hard. Put your trust in God and let him take care of putting you at the right place at the right time. Forget dating and just meet guys, become friends and take it from there. When you know someone on a friendly level first, you get to know the real side of them instead of the "game" put on in a dating relationship where you're both trying to impress each other. Friends are more open, honest, and comfortable with each other. If you can be friends with a guy first, you can make it more later. If you're daughter is anything like I was at her age, no man will be good enough for you and it probably stresses her to see different men coming and going from your life. I had to deal with it with both of my parents.
Slick is right, spend time with your daughter now, because she will be gone later. My mom gave up on the dating thing a while back and focused more on me and we have a great relationship because of it. So now when I do move out, I'll still be around because she was there for me instead of trying to find a man for herself.