sounds similar to what i went through - ultimately, do you have somewhere you can leave it safely and have someone who can maintain it for you?

I moved to Hawaii indefinitely and had to leave my Limited Edition GSXR behind - now, pro's to selling were of course, extra cash etc, but finding one is hard, and a stock one is harder, sure the value's dropped, but not so much that it's not worth selling, but can't be much better to buy again later (its a relatively stable market for that year/type)

TLDR; i kept it and made sure someone could start it for me every now and then... I love to see it when i go home, i know it's mine, and it's my reason to come back (other than family and friends lol)

I say keep it if you love it enough to want to come back to it.
if you're waffling, sell it, you probably wont miss it anyway

 

Dude! Just get rid of it and stay in Europe! I lived in Italy for two years and wish I would have never left... I didn't see where you are going to school. I am just saying, stay as long as you can!