This situation is both painful and pleasureable - in equal measure.
Whether conciously or not, you are enjoying inflicting this emotional torment on yourself, because although you don't feel in control, you actually are in full control.
This situation is something you can 'enjoy' without it actually going anywhere - your object of desire may well be unaware of your feelings, or aware and does not reciprocate, which means there is no danger of control ever leaving you.
The only problem is if the balance tips, and it starts to affect your in a way that makes you unhappy.
My advice - from experience - is to enjoy the feelings you have as long as you do enjoy them, and this will simply run its course - but there is no guarentee of how long that time will be.
When it has passed, you will look at this man, who has resumed his status as a perfectly normal individual, and not al atll embodied with the god-like power over your waking moments.
If however, it starts to really hurt you, then that is the time to cut off all contac, go 'cold turkey', and get over your feelings.
Hope this helps.