You in now way have failed. You still went a long way before you had those few. Look at what you did before and know you can do it again. Now as far as getting back to e-cigs again...
Are there any types of flavors you have yet to try from V4L? Like coffee flavor, fruit type flavors, sweet types etc..
If not, try some of those. Maybe finding the right new flavor might get you back to happy
vaping.
If you have tried all that V4L offers it's no crime to try other juices out there.
Also like was said before, a new battery style and type might also help you. Just doing something new and interesting might help get you back to happy vaping.
Things like this have helped me get back before when I slipped. I hope they help out.