You obviously know by now that you're not alone, and I'll add my voice to the masses. I haven't worked on a kit in about 3 months now, and I have at least 4 that are in various stages of completion.

Don't fret over it, leave it be for now. If it's really bothering you, then find another kit that you're interested in building (maybe something easier), and start that. I've found that I quite often will finish a different kit, then wind up going back to the one that was set aside.

By the way, here's a potential motivator for you; on June 26th and 27th is the Regional Scalemasters Qualifier at the Gardner, MA. airport. (Gardner is north west of Worcester.) Flying generally starts about 9:30 or 10:00 each morning, and there's usually some very nice aircraft competing. Maybe seeing some of them will help.

One of the clubs I belong to sponsors it, and I'll be there as a static judge again this year. We have a food tent, and if you come you might want to try "Jim's Surprise". (Or maybe NOT. )

I'm guessing it would be an hour and a half to two hours drive for you. Assuming you still live where you did when we last wrote. If you're interested, PM me and I'll give you decent directions.
Dennis-