OP, I had a similar experience coming back from my 4-stent procedure. The procedure was done last December and the doc told me to lay off the bike for about a month or so.
At the end of the month I was chomping at the bit to go back to riding. Then after my first couple of rides something happened and I just had no desire to get back on the bike.
Physically I was feeling great, it is just that mentally I had no desire to get back on the road.
It was a struggle just to put on my riding clothes and jump on the bike.
But I kept riding, albeit shorter rides than my usual rides just to get out on the road and get back the "feel" for my bike.
I am now back to my old self, feeling motivated and good about my riding.
As others have suggested, start with baby steps, do shorter rides and concentrate on how good it feels to be on a bike. This may be also a good time to do maintenance on your bike, clean the chain, etc. You may even want to do something seemingly unimportant, like get new bar tape (and learn to install yourself if you don't already know how).
All of these things should help to rekindle your romance with the the bike and bike riding.
Good luck and ride safely.