Why Pisces men disappear and what do they do

I think that he is low on energy from work (not the daily stamina energy)..like...In my shoes, I like to run off to my own cloud 9, and my friends are left wondering why im absent or acting like a loner. Its almost like this:
you have a solar battery (piscean..myself for instance), and you plug it in to a device, and it gets used..drained from supplying energy to the device's parts. Much like myself, I will eventually drain myself by using my energy to put myself before others by absorbing the moods, feelings, and behaviours given off by others in order to get a sense of the situation at hand when interacting with people. after a while (maybe about 2-3 days or even a week), I get exhausted from doing that, and without notice, Im nowhere to be found by my friends. I might be in the same hang out spot, but Im in my own world, "recharging", so to speak, as would the solar battery I mentioned, for another use. the solar battery would need to be in the sun (piscean being in solitude and solace, not isolation) in order to recharge before being put to use again.
Pisceans are usually easy-going people who are easy to get along with and to be received well by others. Where do we get the energy to do all of that I dont even know, but that is why (at least from personal experiences) I disappear from time to time.
Hope this helps!
P.s. if the pisces is into you, he is into you. he may or may not send the right messages, but if he really does seem interested, he will be back, just like the battery smile