If you're part of a couple, the dynamic of your relationship after a birth or an adoption may change drastically. Usually, one partner takes the brunt of child-rearing, and it's common for someone to feel that he or she is "doing all the work" -- midnight feedings, making lunches, constant laundry.
If you're a single parent, you may feel just as isolated. Friends who don't have children may not understand the time commitment kids take, or why you can't just "take a night off."
It's important not to let your relationships fall by the wayside. Of course your child is the most important part of your life right now, but you need friendship and love in your life, too. If you're part of a couple, make a date right now -- and you aren't allowed to talk childcare the whole time. If you're a single parent, take a friend up on his or her offer to help and just get some peer interaction for a change.
The relationships in your life will change after a child enters it, but change doesn't have to be a bad thing. You'll make new friends with kids, but old friends (the good ones, at least) will stick around. If you're in a relationship and you both work at it, your connection will deepen and not disappear.