Friends or Colleagues

It's 11:06 pm now. And I'm thinking about recent happenings regarding my friends / Colleagues. Why couldn't I decide whether they are friends or colleagues ?

One of them has a 5 year old son and a less than a year old daughter, similar to me. I used to think we have common topics to talk about, until recently I'm became wary of her. She began to aggresively look for school for her son and began to tell me how well her son does. She asked me lots of questions regarding HHK and affliations, and when she knew that I am not hoping for CHS anymore because of certain reasons, she began to ask me questions which makes me rethink my decision. She went for family photoshoot and emailed her beautiful pictures to everyone she knows.

The other colleague, has a 1 year old son and she engaged a babysitter (my cousin-in-law)from my recommendation. However, my colleague would feedback to me when she or her husband thinks that the babysitter shouldn't have said. Now that this colleague is preggie, she goes around asking for 2nd hand maternity clothes (even though she has some). I took my maternity clothes to her house, and on Tuesday, she told me over the phone that most of the clothes are too big for her.

I think I'm a bit oversensitive, but I couldn't help thinking the following:
1) I'm being made use of by colleague #1, to join the HHK and also to buy a reader set for her son (until last minute she changed her mind)
2) I'm also being made use of by colleague #2. Shouldn't have passed her the clothes, as I could've sold them

For colleague #2, whatever my CIL told her is not unfounded. My CIL warnings are from her years of experience of being a mother. However, my colleague #2's husband just brushed off her warnings as untactful and superstitious comments.

Why are there such people in the world ? Don't they feel embarassed asking for help from people ?

Maybe I'm just too sensitive. Maybe I should change to become like them, anyway 在家靠父母， 出外靠朋友. But it's really not my nature to be like that. I would rather spend a little money to buy the things I need, than to owe people a favour.