When the night settles

Why is it that at night when the sun fully disappears When the day settles and everything is supposed to be more clear I sit here confused, alone and feeling the struggle of all the thoughts and feelings my mind tries to juggle I have so many good things going on in my day to day my kids, my home, my work, all the things that are here to stay they keep me going they really do but as the night hits, my thoughts go straight to you and you do make me happy and you do make me smile but I know that the attention only lasts for a while Reality hits and so does the lapse of when I can call and see you perhaps I'm left feeling lonely and I know that I shouldn't because forgetting me, you've always said that you couldn't So why is it that at night when everything settles those feelings of not being good enough, with those feelings my heart always wrestles