My advice is that if you're "finding it hard to get out and get going", then it's worth considering not doing it, and doing something else instead.
I don't know how long you've been running, but I know it's some years. Very simply, you might have become bored of what you're doing and it might not be giving you the same excitement/enjoyment that it used to. At a point such as this, I would consider either a different form of running, (such as middle distance track), or possibly even a completely different sport.
As Graham Breeze has proved with his cycling, as long as you're doing the same level of cardiovascular training you won't lose that. You might lose muscular adaptions, but you will retain the neurological technique so if you (hopefully) find you miss it again it wouldn't take long to make a return.