First and foremost, Aquarians walk to the beat of a different drum. Independence is the core and any outward expectation from someone else makes us feel cornered and trapped into a behavior we are not comfortable with, and don't do well.
Friendships are almost more important to us than committed partnerships, and anyone poking and prodding to find out who we are is a threat. We will open up on our own and divulge more information than most want to hear, but if it feels as if someone is investigating us we will clam up, shut down and disappear.
We are not committment phobic, but very slow to get there. That is because once committed we don't let go, and therefore, we weigh every possible scenerio to make sure we are able to follow through with the committment.
I have very close, immensely important and dear friendships with a few people. Some I see or talk to a couple times a week, others I don't have contact with for months, sometimes years. Life takes you down many paths and sometimes those paths require all our attention, that doesn't mean that those friends who are on different paths aren't important.
If someone left me a plate of cookies "just because", I would be suspect of what was expected from me in return and I would be very uncomfortable. Especially if they were left in my car, just thinking about it makes me uneasy because it reminds me of being stalked, invaded.
I'm not trying to be judgemental here, I know dealing with an Aquarian can be frustrating and many times infuriating, but we can also be a lot of fun, and once we are a friend (unless you lie to us) we are a friend forever.
Hope this helps.