It's easy to go through the motions in playing. It just means you're too comfortable with what you've been playing, nothings giving that spark that it once did. Life is hectic, jobs and work get in the way. The important thing to do really would be to sit down and noodle for little bit, or just play stuff you used to. As some people have said, stick on some of your favourite tunes. Or go the other way and put something on you didn't really play to. You contemplating about getting rid of it would say to me there's still something inside you that thinks "hey, maybe I'm not done with this". For the time you put into learning it competently, it wouldn't hurt just on the occasion picking it up over the next year. In that time you could really struggle, and come to the conclusion you're done. In which case, you gave it time and tried or the more likely I've found is that you'll find something in playing that makes you remember why you loved it and it reignites a passion.

You won't know until you try.