Rivers and shoes are the most common elements in dreams. Rivers mean change, complex change, better change, or difficulty. Shoes suggest your own direction, way of doing things, choice and way out. Stone generally implies difficulties, but it seems to be a support in your dreams.
In fact, if you don't see the recent situation behind you, your dream implies a situation: at first you thought your life direction was smooth (highway), but suddenly you were forced to change (crossing the river). On the way across the river, you see a woman who is very important to you (on the stone), and you are likely to lose her (dying). Instinctively, you go to save her (shouting), and you are together (crossing the river together). But you feel that you have lost your future direction (lost your shoes), and you want to go back to your previous choice (looking for shoes), but you find that everything has changed (cross slippers, double people also symbolize feelings), and you know that that is not the life you want (you said that it is not yours). You think all this is arranged by your aunt by default (there is your aunt by the river).
Dig your heart: you are in a psychological period of confusion and choice. Personally, I suggest you rationally analyze what you really want. Old love is sincere, and new love may be more suitable for you in real life. After all, the success or failure of a marriage relationship is often related to what kind of woman you marry in the rest of your life.
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Reply to your supplementary question:
If you are a woman, the above statement can only show that your relationship with this woman has changed, and this woman is a realistic portrayal of people who have experienced this change. In other words, in reality, people who have similar emotional experiences with you are tortured badly, which is also your change of outlook (river). It's a good thing you didn't give up and help her through it.
Because personal affairs are busy, I won't go to Baidu for the time being, so I can't help you according to your supplement. Please forgive me. Some common dream interpretations are introduced in my space for your reference.