Is it normal to hate someone but still be nice to them?

Ok so I have this friend. We are good friends and I like her but lately I am starting to hate her. I still like her because she is nice. But she is prettier and taller than me and gets everything! everyone babies her and everyone goes after her just because she is freakin pretty. She is the youngest and annoys her brother so much and she is so stupid. Not like education stupid, more like understanding things stupid. Like once she was fighting with a girl and she screamed at her ( as text) and then the girl screamed back and then she said "calm down". Like what the f. She also has a bad style and doesn't have many clothes but me I'm more into style and clothing. I wear dresses and skirts while she just wears the same top and pants everyhwere. But recently my mum gave her one of my dresses because it didnt fit me! and now she is all like "oh yea i love dresses they are so much better" and everyone just goes after her because of my dres and my style. Like SHE DOESN'T DESERVE THIS ATTENTION BECAUSE OF WHAT I GIVE HER AND TELL HER AND TEACH HER. I love to dance and she is an okay dancer but she boasts a lot about her being awesome and stuff. So once I learn this dance and i was really proud of myself ( It was a lot of hard work). And she tried to learn it and so i taught her all the moves and styles steps and the c-walk. etc. BUT SHE GOES OVER AND begs me if she can TEACH HER PUNY FRIENDS MY CHOREOGRAPHY. Like dude, thats my hard work and your not getting credit for it. Also she dated my crush 3 years ago when I still liked him and she knew about it. ANd she didt tell me until this year. Like sometimes I just want to bash her. She talks to my crush and flirts with him and when I tell her to stop she acts all stupid and says " He is my frind gosh im not doing anything". And she judges people a lot. Like she would say things like "she wont get any guys in her life because she is so ugly". Also SHE IS ALWAYS SAYS EVERYONE STARING AT HER!!!! you have no idea how may time she says that. at school she would be like "oh he is staring at me" or "why is everyone staring at me" or "that guy just always glares at me im scared he is gonna rape me" like stfu u idiot no one staring at you so lower your ego because no one wants you. She also has to crush and 'bags' every cute guy we know. she always that she loves hi,ma nd he is her baby blah blah blah. And then when she gets bored of it she starts dissing the guy. Also she so stupid and she cant wuse social media. Like she is so desperate to get followers and like checks her followwers every second and starts complaining and i tell her to follow people so they follow her back but she just makes up lame comments like "um im not ready to follow them" and if someone doesnt follow her back she starts dissing them and blocks them. No wonder no one wants to follow her. After all of this, everyone still wants her and she gets everything and she gts to complain about everything.She thinks she is all cool and accuses people of "copying her" when really she just wants attention.I dont open up to her and tell her all of this or stop being her friend because she is really nice and we have been friends for years and we do sort of share interests. She can be so nice and fun she is almost like a sister but then again she can be a different person.