Difficult thing to do when you're in that mode.
Maybe try setting some rules for yourself to follow?
i.e. you'll only allow yourself to call him once or twice a week, or set a timer for your calls and limit them to 20 minutes or something like that.
If you leave things wide open with no set parameters to keep yourself within, then chances are you'll continue doing as you're doing.
Same thing with your special interest if it's taking up an unhealthy amount of time. Force yourself to focus on other things, learning other things, doing other things, just to break up the never ending time sucking black hole that a special interest can be.
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No

for supporting trump. Because doing so is deplorable.