Fine. I dunno how to describe love but I can tell you when I realized I was afflicted.
I was thinking about taking a vacation in a years time when I realized I had just automatically assumed Jess would be going with me. I didn't even think "I wonder if Jess would go," I just started planning under the assumption she would be there. It wasn't long before I noticed this assumption in just about everything. You stop reflexively thinking about I, and start reflexively thinking about her and I.
I stopped accepting myself. I used to be the final authority on how I would perceive myself... now she is. When you are in love, all of a sudden, what another person thinks of you isn't just important, it becomes literally everything. It wasn't enough to be a skinny alien body... I needed to be a clean, well dressed, successful skinny alien body. These things I never cared about, but I had to start because I didn't want to make her look bad. Love makes you want to improve yourself.
Finally, love is very much a chemical addiction. Recognize the signs. She goes out for a girls night, you fret for hours over her safety. You don't see her for a couple days, you become irritable and melancholy. You find out someone may be threatening your supply, you go nuclear before your rational mind can assert control.
Maybe not that much wisdom there, but those are the things I noticed.