To help out with you sex problems... take a supplement! Either v1agra which is very expensive or just grab some chinese herb tablets which are very cheap (works out to be a $1 each)you can get off of ebay.
spank the monkey before you plan on having sex with her, then take one table ~1hour before doing it... and you will be fine, you will have an erection stronger than ever before and if you still don't last long the first time, you will be hard in 5 mins again anyway!
Be confident with her in bed! Be the dominant one! Tell her what you are going to do and let her know you are going to enjoy it! It may not fully work out with this girl as she seems to have sexual problems (only likes penetration?) but they are some handy tips for the future aswell