Should I leave her for her friend?

Good day mamas and papas in the house, please I need your help on this. My girl and I have been dating for exactly 5 years now, I like her a lot but I hate the fact that she has this ‘I don’t care’ attitude. She has graduated for 4 years now and she has not done a job since she graduated from school. It is so bad for her that she does not know how to write a CV properly. She depends on me for everything as if I am her father. Last week, she came to spend the weekend at my place and she started her menses in my house, you won’t believe it that this girl took tissue paper and put in her yansh and waited for me till I came back from work to give her N400 to buy sanitary towel. I was so embarrassed for her. I started to imagine a lot of things like if I marry her, is this how she would be waiting for me to come back from work before she can buy even matches to light the gas to cook. I have helped her apply for jobs but she keeps complaining that 50k job is too small, she has no experience whatsoever and she wants to get a job of 150k, she said it is either she gets that or nothing. I am super tired of her. On the other hand, I ran into a very close friend of hers, that one just came back from the states early this year where she went to do her Masters program and already, she has gotten herself a job with a firm close to my office. The girl is looking so good and classy. We exchanged contacts and we have gone to lunch twice this week already and I am falling for her already and I know she digs me too. Ii just need to know if I would be justified if I leave this my lazy, greedy girlfriend for her friend? Thank you all and I await good responses and not insults.