If, during my 'seduction training' I meet girls who are excellent future gf material, but I am not willing to commit yet.... how to best keep them in a 'holding pattern' of not quite friends, in order to maximise chances of a relationship at some point in the future?

I think maybe my question could be rephrased as how to maintain a non platonic but non sexual relationship with a girl over a period of time?

I say non sexual because, she will (generally) not be able to handle a long term sexual relationship without me committing to her- it will make her upset, then she will emotionally shut me off.

I say non platonic but I don't want to be friendzoned by her (even though I know that I am perhaps friendzoning myself).

Assume these are girls who I have already had a short sexual relationship with. I.e. we did not start as friends, so this is not a 'how to get out of friendzone' question.

Obviously she may get into a long term relationship in the meantime, and there is nothing I can do- or would want to do- to minimize the chances of this, but assuming she remains single in a year (for example) how can I best position myself to enter into a relationship with her?

Thanks chaps!