LOL Okay, I see your problem with getting out there. Maybe Grandma could take you out sometime just to visit the horse...take him some apples or carrots...just to say Howdy and get a quick horse fix.That shouldn't interrupt any training schedule. But you do need to ask the trainer and keep in touch with her.
Sounds like you and your boyfriend have a good exercise plan to keep you busy. Beats sitting around eating bonbons and feeling blue. It will keep you in shape so you will be ready to ride when your horse comes home!
When my boyfriend joins the military in a few weeks, I don't know what I'm going to do for exercise other than ride my horse. I usually ride a bike for about 2 1/2 miles, and then walk half a mile up hill. I'm so used to having an exercise buddy, though! I guess I need to convince one of my "horsey" friends into running/bicycling with me. XD