5 year relationship is over or on the verge of becoming a lifelong relationship? you be the judge?

I am a late 20's year old man with a hobby model girlfriend ( mid twenties ) who also works full time also. She is very beautiful and we look real good together. She is also a very sweet and trustworthy girlfriend among other things. We have been together for 5 years now and we have had our ups and downs like every couple. We have been living together for a year now and its been kinda ruff sometimes and great other times again usual. My girl is very self centered not in a conceded way but about life in general. She constantly makes plans for herself first and is always thinking bout number 1. Which is ok but to a certain extent I won't go into details but trust me its very annoying. She also isn't affectionate which is kinda weird since guys usually have this problem not girls. But netherless she is very un affectionate to the point where I have to tell her to do things like cuddle and kiss me. I'm not trying to say I am super mushy but damn I need some attention and love otherwise we just roommates. I told her this and she has gotten better but its still not up to par with what I want. Also she dosent cook at all she only cooks meals for herself sometimes usually the weekends and its always stuff she knows I don't like. Come on I cook everyday and im quite good at it but help out alittle not too much to ask I don't think. Her excuse for not cooking is that she gets home late from the gym. Which I think isn't a valid argument because cooking dosent take hours it takes 30 minutes tops for most dishes. She also isn't a horny girl at all I am a really ual person and she satisfies me when I get her in the mood or push her into . But she never gets horny without me pressing her its rediculous I thought it was me the first year but then later I find out she has never been a horny person. I tell her to try to be more ual and its a real annoying thing to tell your partner and she take as being a chore to keep me pleased. Also she is unsure bout having kids and marriage. I told her straight up I need to have kids and get married its something I want to do before I die. She really hates kids because she says she has no expertise at child care and marriage she don't believe in. I told her its not a belief thing to me its something I always wanted to do in my life. Last but not least she isn't open with me about her feelings. She gets all fustrated when I ask her about her feelings because she dosent know how to express her thoughts. I tell her if we can't communicate about these kind of important stuff how is this relationship going to work. All in all she is perfect besides these flaws. She is fun to be with, smart, sweet, playful, daring, adventurous, trustworthy, kind, listens well, and other things which I love about her. I really love her more then any girl I have ever loved in my life but im really nervous about the times we might have later down the road. Being that there are so many things up in the air I don't know if I should scrap my losses and move on. Or try to stick it out and talk to her straight up no excuses about these problems. I gave her a date in which she has to talk to me about these things or we break up for good. I think I waited long enough and I hope it works out but the more I think about it the less I think we will work out. Sigh. I know im supposed to ask a question sorry about the long rant had to get it out. My question is from a woman's perspective what do you think is going on in her head? And how do you think I can approach this maturely? Thanks