Why do scorpio men play mind games?

We been off and on for a year now didnt speak for 3 months and he has mood swings like no other!!!! one minute suffocates me one minute ignores me..Whats the best way to see if he truly cares and means that he loves me??? Stop calling him so often or permanently and blow him off when he wants to hang out or what?? Talking does not help with these creatures lol.... I feel as if im always there for him hes never going to want a commited relationship....isnt it true if a scorpio truly care and loves that person theyll do nething to be with them? help any ideas???