The second time you fall in love with someone, you don't really fall. You walk, stop, check, hope, walk, doubt, stop, walk. You're more cautious. You already got your heart broken and cannot risk it for an another time but you're relieved, you're relieved because you can feel the butterflies in your stomach again and know that some one else loves you back again. You worry that your ex will find love sooner than you but then you remember and you can peacefully sleep while talking to this new person again.
You're now going to be a more sane person. The first time you became an insane monster not knowing how to act in various situations with all those powerful feelings but now you have grown and you have learned and you know what works and what doesn't. Although not perfectly.
You would always compare the first love with your second and that is okay. You will be judging and comparing each and every move just to make sure those mistakes are not repeated this time, weighing out all the negatives and the positives and being surprised how can you love a person this different than the last.
First love would be special. It gave you lessons to remember and taught you how to love. It is dreamy and far away from reality but once you get your heart broken you come into an isolated bubble where you want to stay out of reach. Then comes a person whom you would let inside the bubble making yourself vulnerable but this time you're mature and both of you rise in the bubble.
Ending this post with an image that perfectly describes it.