Sometimes I feel feminine and other times I feel very masculine. It can go back and forth depending on my mood. What is going on?

I don't think I'm gay and I don't have the desire to dress like a woman or become transgendered. I am 20 now and all of my life I've always just been a stereotypical "one of the guys" man. I cussed, drank, smoked like a freight train, got into fist fights on a regular basis had a skin head and a big goatee, worked construction and farm work all my life and loved sex with women and had alot of it (this relates in a major way I believe). I used to be a big buff mutherfucker and had a reputation in high school as the big redneck not to be fucked with but got along with everyone. I didn't feel like I was acting like that as a cover up or anything, it really just felt normal. but after I got out of highschool and hit about 18 I calmed down alot, almost too much. I became less interested in sex and from my perspective I just felt burnt out on it and have a been there done that attitude towards sex. I don't fight and go out of my way to not have to fight anymore. I hang around with mostly female friends with no ulterior motives for sex and actually live with a female best friend. I quit working hard manual labor jobs and work in a grocery store now. I've shrank into a skinnier average body (although still kind of cut for my size and not working out). I am more in touch with my emotions now and feel more need to express them and have an emotional connection with someone. When I'm angry I will revert back to my old ways and mentality, and when I feel neither happy nor mad just normal, I just feel normal. But when I'm really happy or feel like I connected with someone after having a close conversation or experience whether it be with a male friend or female friend, I feel like I catch myself WANTING to carry myself differently. I put a little sway in my hips, I put less boom in my voice, I kind of feel "cute" if that makes any sense (particularly when I wear pajamas for some reason). I sit differently, walk and talk differently. My whole demeanor just feels kind of feminine. Why Is this? What is going on? Is it because I hang out with females most of the time? I know this seems like a bit of a ramble but I just felt the need to spill my thoughts a bit, I just feel like I kinda changed out of nowhere. Any comments or opinions are welcome. Thank you