Not an official little but still needs help

Rikki • I love my boyfriend

So my boyfriend and I aren't technically a DD/LG relationship but I tend to go into little space often and he'll take care of me, whether it's wrapping me in my baby blanket or cradling me in his arms while I draw. I've hidden the fact that I want to call him daddy for about 6months because he's expressed discomfort about it in unrelated conversations and he still maintains his caretaker position without an issue. I feel like I were to push it to more childish things like holding stuffed animals or having him dress me he would feel as if I'm too childish and get weirded out. Also oftentimes I'll go into little space while his brother is around and he'll call me a five year old or childish and it hurts my feelings pretty bad because I feel as though he thinks my coping mechanism is weird. He doesn't know what a little space is and I feel like he would see me differently if I explained it. Basically what I'm saying is, how do I get better at avoiding little space when other people are around and how do I explain to my boyfriend that it's just a coping mechanism and that I don't actually want to be a child. I know it's easier than it sounds but it's become so comforting to me and I love when he takes care of me. Help pls