Dealing with Overwhelming Feelings in a Relationship

I don't know if this is good enough to send to my partner, I don't want to sound like I'm being rude... "I'm sorry that i have been distant these past few days and at other times. Sometimes when things are overwhelming, I have that feeling of wanting to have space, which could either be for: dealing with my thoughts, needing space to do something like an activity, that I can't talk if I'm really busy, spending time with family. A lot of it I cannot explain and it's best to deal with certain things myself. Please do not take this the wrong way but I feel like your hygiene is slipping, but I don't always brush my teeth everyday but I do need to, and you do as well, that I don't want to smell urine when you lift the covers mixed with sweat from your underwear, it's not very nice at all. If we do get intimate, i dont want the risk of getting sonething from bacteria etc. That I also want to eat healthier, yes we can have cheat days but not like we have when either of us come over with all the takeaways and snacks, like once a month have a treat like that but I want to be healthier because of my conditions, weight may be a factor why I'm in a lot of pain. I'd like to lose at most 5 stone so I'm around 9 stone. I'd also like to fit into really nice clothes that my body won't let me right now. I also want to be stronger, that's why I'm going to the gym as my strength is really low. Sometimes I'd also like to not be touched as such, if you understand that. Part of the day I like the affection, the other comes out as that I like your company but I don't like affection. It's very hard for me to communicate these things and it may look like I'm being rude, distant or not myself. I do appreciate as well being asked if I'm okay, but asking it so many times in a short space of time does slightly trigger me in the way of it sparks unwanted anger"