Okay. So you want to have experience with some romantic relationships and then eventually find someone to marry and it's not allowed to be the first. Am I getting it right?
Then because you want it to be in a committed romantic relationship, you want you both to be invested romantically. You are used to building up friendships but don't know how to make them turn into romantic relationships.
So lets first define: what is romance? Is it push pull bantering or is it the handholding, roses and first dates. Romantic settings like candlelight dinners... movies.
Step one for those is having a one-on-one meetup. There can be people around, but it has to be a conversation between you two.
Lets make it an escape. I am going to paint a story. It doesnt need to fit you or be your scene, but am just gonna experiment some
The second step is the location. You want it to have a more dreamy vibe. Something that's not everyday. Somewhere where both of you feel you can let go of the daily stressors. Where everything seems possible and nothing extra ordinary. Then...
The third step is allowing for smiles and love vibes. Important in this is that you go to the core of interest you feel for this other person. When you have that, your eyes twinkle, your skin glows and you feel the soft atmosphere and relaxation.
The fourth step is to make the other person doubt whether you made a move or not
The fifth step is waiting on the other to make a move.
The fourth and fifth keep being repeated all the time. Sometimes the roles switch.
And they grow stronger each time.
It is easier when you look feminine, but i think it works for every date. The hard part is not the date itself. It's finding the right person to have it with.