Feeling lonely with a newborn

Hey ladies. I am sure this is normal but I need to vent. I have a 5 year old son who is just the sweetest. I also have a baby who is a week and a half old. My husband works, he is off Sundays and Tuesdays and works 2 long days a week. I feel so so lonely. I even have family around, but I can't help but feel overwhelmed and lonely. I love both of my kids so much but I feel so much guilt for feeling more stressed, overwhelmed and tired. I feel more of those things than pure excitement of having this sweet girl.

What do you do to make yourself feel better if you've ever been through this? I'm desperate. 😫