Expectations : why isdatibg so hard for you?

Just out of curiosity, i am at middle age of confusion...
Can ANYONE tell me what they are looking for in a partner, wife, gf/ bf or significant other?
I am a straight female and I am here, just curious as to what common grounds people view a wholesome relationship as...what do you exspress or want to happen? Why did you choose who youre attracted to?
Also, If youre married, how long? What makes marriage last...
If you have divorced, whats been a common denomination in why it ended?
Ever had a rebound relationship? What similarities did the new relationship hold that the past had..
Just wantibg to know, cuz i fear ill throw off an expectation and i just wanna know what others are expecting so i have an idea. Thanks!