BlueRose
Been there done that. Right now my husband works from home and I'm home all day, too. Some questions for you: how old is your daughter? If she is preschool age, look into taking a Mommy and Me type class. That way, you'll both get out of the house and meet new people. I did that when my daughter was a baby and toddler. Even though I didn't make any lifelong friends, it was still good to get out and compare notes with other parents. Plus it was nice to be able to ask the teacher questions.
If your daughter is in school, look into volunteering in her classroom. You don't have to go every day. When my daughter was in elementary school, I would go in twice a month and sometimes helped chaperone field trips.
As for your husband---do you at least, as a family, go out together on his days off? We would go out as a family on weekends even if it was just going to the mall and having dinner. Do you have family dinners every day? If not, start doing that. Again, it's not the same as one on one time as a couple, but it is a start in the right direction.
Tell your husband that you want some time together with him alone. He might not be aware that you long for together time. If he is an introvert, he probably thinks everything is ok. If you're more extroverted, you naturally will long for more company. If you can't afford a sitter or don't know anyone you can trust, tell him that you want to set aside some time together--even if it is to just rent a movie one night a week.
You don't say how many hours a week he has to spend working. If he routinely puts in more than 40 hours a week, he may be feeling overwhelmed.
Take heart---kids are little for a short period of time --relatively speaking. Before you know it, she will be older and you will have more time for yourself. That's how I looked at it at the time--it doesn't last forever.