Bro Shaving Ryan,
Its all in the mind.
Many times its because we think too much. Thats why go limp midway. I experience this too at times especially with gers who r too mechanical.
I have friend who cannot even have sex with a condom. The thought of putting it on make him go limp. Sigh... Thats a bad mental block to have.
S, jus focus on the ger and the sex. Hopefully it work out better for you.