We need other people throughout our lifecycle, it's hard-wired into our brains. Any meaning, positive or negative to one's interactions with another is wholly "made up" by the person giving the meaning. The fantasy of a really nice, thoughtful, listening, loving, wholly at our service person being our mother is not anything to be ashamed of; yes we learn to take over some of those roles for ourselves but the operative word is "learn". When does a baby get embarrassed because they can't walk yet or aren't toilet trained? Being in one's early twenties and out in the world by one's self for the first time is very very scary! Wanting support, comfort, "mothering" is even more natural then, I'd think, than in one's teens where one is trying to grow away from the actual mothering one has had?