I have had the same thing. It is getting better now but it takes DD a while to warm up to people (even family). She is normally attached to my leg or pulling up at me.

It started to get better when I decided that I couldnt go on like this. It wasnt healthy for either of us. I started to talk to her. I would leave her int he bedroom with DP and say "Stay here with Daddy, I'm just going to get you a bottle" and I woul say it to her the whole time I was gone. I did this for lots of things. "sit down and play" Mummy is just going to get the clothes. I'll be right back". This helped a lot. i can now do things around the house and she will do her thing and then come and find me after a hile, then go back to doing her thing, etc.
There is hope though