I know the pain of motivation problems and how distressing it can be.

I think it can be related to your reward sysyem, dopamine regulation, which ties to alcoholism/brains with addictive tendencies. ADD drugs, I think, work best for this if you are interested in medication. Also Wellbutrin could be worth a try. I think it coincides with addiction brain, but also trauma, dysthymia or ADD.

Are you motivated when it comes to exciting things. including new information discovered or solving problems?

This is one thing behavioral therapy concepts can help. I think you can train your mind to 'do' instead of think about it. Take the action then let the motivation follow rather than wait for the motivation to come. Go away from the anxiety and renumeration and not towards it.

Psychodynamic exploration can help if you can get to deep work if there are things behind this such as fear of success, self sabatoge....etc.

Another possibility is not being present, living in the future and past only. Mindfulness is one remedy. I recently discovered this issue mostly comes from dissociation brain in my case so am starting to make progress. It's also common that people who intellectualize a lot have chronic depersonalization, which is very difficult to address.

At any rate, I don't normally support the bipolar 2 diagnosis, which serves as a catch all. What was your onset like or when did it start? Identifying the etiology may help craft the right solution. It's been suggested I have bipolar as well but I too am reluctant to try those medications. (maybe i should reconsider, hmm.)

This is something I'm working on now and have struggled with for years. I've made some progress with the above in mind, but it is tough. I think some if my issues are related to burn out from chronic stress, too. as I have list my concentration abilities over the past few years (which has had a terrible impact on my career).

Just spilling out a bunch of ideas. Hope something I said sparks some thoughts.