I think they biggest mistake you went for was attempting to go for front bottom action instead of breast rubbing. She may well have had the decoraters in and girls are sometimes funny about you trying to tickle a snatch mouse.

In future I would suggest gently caressing her back or hair and occasionaly licking your lips in an unprounounced but equally sexy manner. You can practice this by dabbing small amounts chocolate on your lips and just using the tip of your tongue.

Hope this help, BTW I feel for you I bet you had big time blue balls when she left.