This isn't about evening classes, mummy friends of gin.
I think you could be surrounded by a million people and be drowning in gin, you wouldn't be lonely but you would feel alone.
Sounds to me like you miss your husband, and that you want what you had before and a bit of love and attention.
And so what if the OP wants to just come on here and vent, if someone listening to her vent will help her then maybe people should try and support her to figure out what she does want/need - keep suggesting the things she has clearly said she doesn't want or need is not helpful or supportive.
It takes two people to make a marriage, I am at home all day on my own and DP at times works long hours. I appreciate he works long hours, I know he is very tired when he gets in (I used to work 60+ hours, C level role like him so I fully understand the pressures) I appreciate that he needs some downtime BUT
he doesn't come in, ignore me, eat the food I've made him, watch me run around after DC, ignore me for the rest of the evening and only show me a glimmer of attention when he decided he wants to have sex with me.
I am actually really upset for the OP reading this, it sounds horrible.