Very clingy 7 month old

Michelle
My 7 month old baby girl has been very happy lately, EXCEPT for when she's in her walker or activity center for more than 10 mins, or I start to walk away. I can barely eat a meal or do the dishes without her starting to protest and cry for me to pick her up. I know she loves me and wants my attention but sometimes it's just so frustrating! 
Do you moms have any tips? Any idea why she's doing this or when it will end?