I sometimes feel like a "man child" myself. I like to play Roblox and got plush toys. I sort of like the colour pink as well. I'm 22 years old.
Instead of pushing it away, I embrace my child like interests. I used to bring my green plush puppy into work everyday and people usually find it adorable.
As for wanting someone to take care of you, maybe you need to learn to become a bit more independent. Unfortunately you can't always rely on other people other than yourself. If you don't do this already, maybe try to cook something for yourself! When I lived on my own, I would bake and cook different things.

(P.S: I just realized my profile pic has a pink plush toy )