It could be very good for you. Let me explain by narrating a weird (and there is a reason, I call it weird) dream I had last night.
My wife was leaving me (reason unknown at least in the dream ;)) and I was trying everything possible to stop her. Tears were rolling down our eyes and it felt that both of us were living pain in whatever decisions we were taking/facing. I hanged on to the dream (in spite of the urge to get relief in the true reality) to see if I could get to the reason that was causing this pain to us but that did not help.
Now some context – my wife and I have been happily married and are still crazily in love with each other. But the moment I came out of the dream, I curled up to my wife and whispered ‘I love you a lot’ as slowly and deeply I could. It also set off a series of thoughts on how my life would change if she wasn’t with me.
The fear of losing her to anything will make me love her more, respect her more, hear her more and more importantly let her be her more.
Side Note: There is a reason I used ‘could’ in the first sentence. If you are losing your sleep (and dreams) for the wrong person/thing, its a start to a downturn.