Hello,
First I'm not a native English speaker , so if I make some mistake please excuse me.
The best way is probably to talk first with someone in your family that you know tolerant about gay. Like this you have someone who can support you.
It's maybe better to not talk about being submissive thing, I mean it's your choose yes, but it is the most important for you ? Just say that you want to marry man is sufficient. The rest is all about your own couple so, I don't think you have to say it, but if you really want to, do it later maybe.
You can also go slowly with it, talk about your sexuality person by person. You don't have to reunite everyone and do a speech.
I personally just say it to my parent and brother and sister like it was nothing and they just say " Oh, ok. " They become curious after that but they was okay with it. Don't make it like it's a big deal, it's just how you want to live and be happy and if you just say that it's the best for you, they probably understand. If they don't , that just mean that they need some time and you have to let them the time to accommodate to your sexuality.
I hope it go well for you, being gay it's not a shame. If you want to become a "housewife" is also your own choice and I hope you found the one you like.

I know exactly how you feel.  I am very much the same way except I am more open about assuming the role of wife and girlfriend.  Sexually, I am a submissive and bottom.  So I am attracted to dominant males.  I tell guys now that I like to wear panties and other stuff.  I try to be upfront so I don't waste time with guys who are not into it.  Being sexually attracted to other males I would hide my true self because I needed sex.  I needed to suck cock, swallow and offer up my ass for a guy to fuck. 

I recently met a guy who wanted me to wear panties and other stuff.  Whenever we have sex he wants me to dress in lingerie.  What  a relief.  I wear lingerie because I can express my true self and please him.  I want him to find me sexy and get hard for me.  I see my role as providing a man with pleasure which in turn gives me pleasure.  There are lots of things I do now that I used to hide.  So, I'd say start letting guys know your preferences and soon, not later you find a guy who wants the type of girl you are.  I have a boyfriend now who likes me the way I am.