Yeh I've been in a situation where I had a gf who was less intelligent than me and I didn't like it. It took her a long time to understand simple things and to join a conversation, she had problems at study and at work and because of that kept changing both of them. It made me wonder what kind of a future we would have, fortunately things didn't work out and I didn't have to find out.
Don't cry, don't regret and don't blame
Weak find the whip, willing find freedom
Towards the sun, carry your name
In warm hands you are given
Ask the wind for the way
Uncertainty's gone, your path will unravel
Accept all as it is and do not blame
God or the Devil
~Born to Live - Mavrik~