Stretched too Thin

I feel as if I am stretched too thin in all the things I have to do. Take tonight for example, Corby and I had made plans with a friend to have her come over, we've done this like EVERYmonth for quite awhile.

Then I heard from my family and my in-laws that they were planning to do birthday stuff for Kami and Lance and since my parents were in Dallas on Jake's birthday they decided to get togther tonight too. Every time I heard Jake say "see ya Saturday" I just thought it meant that he'd possibly see us on Saturday ( we end up there for one reason or another on Saturdays)

Now that I think about it though, on the day of Jake's actual birthday Erin,Phill, Corby and I took Jake out to dinner and then when the meal was done both Erin and Phill said see ya on Saturday too.

How can I do this all and please everyone?