Keep the Bird and get a new Girlfriend, put's a whole new perspective on riding and boredom. With the right GF you can ride one and then ride the other and never be bored. You want to be seriously bored? Marry the wrong GF.
+1 These are the true words......trust me on this one. If your GF lacks the interest in you to ride along then you are at a fork in the road of your life and need to go one way or the other.
A. Quit riding or learn to ride alone and not be bored. She will ultimately insist you quit. ( you already know this)
B. Kick her to the curb and find a GF who likes you enough to go along.