Alright, so...I went on that date with my Mom's best friend and it was a lot of fun. I wore the black slacks and button down shirt that you guys told me to wear and she seemed to appreciate the flower. She looked beautiful! She wore a skirt that was slightly above the knees and a nice blouse. We went to dinner and then went for a walk on the coast of the Gulf of Mexico. Wow...It was really really really really nice. So...I took her back to her place and walked her to her door. She hesitated to go inside and so I went for it. I kissed her. I really did! And she kissed back! So, we really started to get into it and then went inside and collapsed on her couch. I remembered something she had said about really respecting and liking a guy that knew not to try and get in her pants the first night. So, after ten minutes, I pulled back and told her I should probably go. I just wanted to respect her wishes, but when she walked me to the door, she looked upset. Was she upset because I was leaving or because I didn't try and go farther? Does she think I think she's ugly? Did I do something wrong?! I really need your help...

Wow, congrats on going for the date ^^
And as far as I could tell you did good, up until you said you should go. This is just my opinion, but if you are going to start kissing a girl, and then just all of a sudden leave you shouldn't start the kiss. She may've been upset that you sparked something and then basically fled a moment later, instead you should've stayed around, maybe cuddled for a bit or done something to settle the mood..
Or she may be upset that you didn't go far enough; or you could go to her and say that you felt a sense of her being upset when you left that night and you'd like to know if you did something wrong, or upset her in any way- And if she tells you the reason then you'll know for next time and just drop the subject and move on.
-shrug- If I were the woman then that'd be what I'd want you to do because it'd show you care.

NEVER SAY "I SHOULD GO" or " I SHOULD GET GOING"

Lol yeah mistahpho has a point, say " i have to go before mom gets mad at me" or soemthing. because most likely by saying "i should go" she might think you dont like it htere or something,

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well I can understand the leaving bit cuz a guys sex drive doesnt like to just shut off but maybe you should have told her the reason and sho that you wanted to respect her wishes

Well you might have ended too abruptly for her liking. Don't just go from kissing to "I should go." It really makes a girl feel like she screwed up something. Instead go from kissing to maybe some cuddling and light talk.

With the talking you can explain how great the evening was and how much you're looking forward to when you can do it again. When it seems most appropriate, then take you leave. Not only that but tell her you're going to call her then DO IT. Promising something then coming through, shows her that you are interested.

Took the words out of my mouth.