the "another man" is actually yourself, which i believe you know already.
you've projected the relationship into the future (when you'll be at that
height), which is a 'favorable sign' for the relationship to endure.
there's a 'disassociation' of you from your physical form there, which is
simply showing you as looking at things 'objectively'... but to have NO
connection with emotional signals could be a 'red flag' for you to take
into consideration. for the "surrounding scene" to be colorful and well
lit is suggesting that it is both 'life fulfilling' and unhidden/available to
be viewed by anyone with interest (including your 'objective mind').
the second dream is showing you in a society of 'free thinkers', who
are not hung up with body shaming. it's not so much about public
nudity, but about being free to be who you are without needing to
conceal the truth of you. to view clearly below water is to have no
distortion through your emotions... you can trust your feelings.
"I feel compelled to her" is to be guided through your 'emotion'
of love. "right as lips touch dream ends"... "no one can see beyond
a choice they do not understand" [the Oracle, from the Matrix
until you come to understand the 'meaning' of your union, anything
beyond will remain a complete mystery.