Good day and a bad night

I had a pretty good day today.  I was productive and got things done that needed done, I enjoyed time with my family, did something special with my son, rode bikes with my dad and brother and still had time for a movie with the family.  It was a good fulfilling day but damn it's a rough night.  I am too rested from having time off and I can't sleep.  My heart is heavy and my mind melancholy.  I wish I could keep my evenings positive but it's hard.  I want desperately to connect with another person but at the same time I know that's not really sustainable.  The woman I share a roof with is not able to connect, I suppose because of her childhood.  I really don't know, I just know that's what psychologists always blame shit on.  I can't have extremely meaningful relationships outside my marriage as I would want out of my life so bad that I wouldn't stay, thereby breaking my promise to my kids.   This is a long time to suffer like this and I don't know what to do.  I suppose I will try to take it a day a time and look for God's will in it all.  It's just not easy.  Especially when you feel so alone.  I hope in 9 years or so I can look back and read these writings and say "man that was rough, but I did the right thing and I have never been happier".