Does anyone else get incredibly lonely at night?

I'm 4 weeks into this now. During the day, I'm usually pretty good the last week or so, when I stay busy constantly. I can't really do nothing. Down time used to be my favorite and now I dread it the most. The first week or so, there were some nights I got excited to be alone, but now, nighttime comes and I'm sad.

My house gets so quiet. Everything slows down after my son's bedtime, which was usually a really enjoyable time of the day for me because I finally got my break at night and could watch shows and just relax and read and take baths. Suddenly, I feel this loneliness that I can't shake.

For the record, I was NEVER like this. My whole life, I'm such an introvert and homebody, I could not leave the house for weeks and be perfectly happy lol. My sister would always miss her husband when he traveled for work, and acted like he was going off to war and I would joke about it.

I've always been such an independent person. Someone who recharges with alone time, and gets frazzled with small talk and big social gatherings. I thought I would love being on my own.... and this is only 4 weeks in? I can't even believe I'm writing let alone thinking this.

I miss having someone there... NOT HIM. Someone to talk to; someone next to me in my bed...Someone who feels like my person. I do not miss my marriage**.** I'm starting to feel really low and sad. I can be ON all day and great, keeping busy all day with my son, and getting things done during his nap, but once he's asleep at nighttime like 7:30ish, I no longer get excited for my alone time. I get lonely and sad and bored. I can't focus on ANYTHING other than my own thoughts and the fact that this is my new reality.

Hearing "dada" over and over on the monitor fucking breaks my heart. If only he knew what his father had done, to both of us. I had posted about it several times so I won't go into much detail, but basically he was living another life, cheating nonstop. I'll never know the full truth, which I finally am accepting. I know enough..

I miss the feeling of not being alone.

Does anyone else struggle or deal with this as nighttime approaches, loneliness after/during separation and divorce?