How do you find out if academia is the right path for you?
You will get a more helpful answer if you add the field you work in.  Perhaps leaving the question general, but "sneaking in" some info on your field.
I have worked in several industries and never been bored.  Certainly more routine jobs do exist.  But I would not exaggerate the stereotype of industry boring or even of academic research being exciting (it is not, always).  New products, initiatives, markets, etc give many private sector jobs plenty of excitement.
I urge you not to do the Ph.D. unless you see yourself as top 25-50% in your field (a higher percentage correlating to subjects with more industrial hiring of Ph.D.'s).  It is very important to realize that there is a glut of Ph.D.'s on the market.  At least in STEM, the number of doctoral slots is determined by the amount of (mostly federal) funding for research.  It is NOT determined by the number of high paying jobs needing graduates.  [I laugh at C&amp;EN exhorting more kids to go into STEM in the same issue they talk about the intense competition at job fairs...and chemistry is actually better than math or physics.]  

This is not to say don't do it. But go in with your eyes wide open.  At a minimum talk to kids looking for jobs in their final year.  (Or about advisor relations, thesis writing, etc.)  I do think the experience can be OK but you really need to look out for number 1.  Don't just do it because you don't know what you want to do, prof talked you into it, etc.  At a minimum, do a job search in parallel (you don't need to let each "side" know you are doing this).