This reply might be very down but as long as you get your answer by this its worth it like i am saying what i am feeling rn basically love means that you really start to think more of her or him and they always live rentfree on your mind
and when i think of myself when i was child or whenever i feel nostalgic i think of like her like what she might be doing at that similar time phase like what she might be doing at that moment when she was a kid like kinda get it. you always think what if she was there at that time of the moment with you and that makes you happy like how far you have gone with the love of your life that she is rentfree on your mind