My latest obsession!!!

What is love???!!!!????

There are quite a few love struck couples around me and have been asking them as in how did they figure out that they were in love...just trying to find a right mix of answers....have got everything from I don't know to a very difficult question for anyone to answer to global gyaan....

Well I haven't given up yet and am still gonna go around asking.....let me see if I can get some answers and if anyone does have any please do let me know :-)