I've got no option if I need to get anywhere, don't like the bus and taxi's are TFD so it's a bike or trike for me
Same here - trouble is that there's not often that I need to get anywhere and then when I do, I often have to think where and how to lock it up. Not needing to get anywhere doesn't just affect cycling but getting out generally - if you've got no reason and no (available and willing) companion, it's hard to make it happen.
Back on to OP, I often get the doldrums - My friends don't cycle, the need for utility cycling is low (I do about 16-20 miles a week utility cycling - short rides over two or three days usually). I've got favourite routes and they're favourite for good reason - avoiding busy roads, don't need to cycle 5+ miles to get out of town (I live on the edge of town so it's pretty much one direction otherwise busy roads and/or to the other side of the city). But when you do them by yourself just for the sake of it, the same routes over and over again can lack appeal (even though in actuality, they are really lovely rides).
Part of the problem is that the less you ride, the harder it becomes to get out, and the less fit you become, the more your options are limited, making it even harder to get out.
I like to make a couple or more overnighters a year - planned (inasmuch as when and possibly where and possibly for how many nights) and scheduled into the calendar. Then as the date approaches, I frequently find the fear of not being up to it is enough to get me out and on the bike in preparation.