- The Most Obvious Sign: Flirting
This is a no-brainer and you do not need to be a rocket scientist just to know that flirting means your sweetheart might be falling in love with someone else. And, if you ever catch him flirting with your friend, chances are he or she is falling in love with that specific friend. No matter how much you want to convince yourself that your sweetheart and your friend would not be courageous enough to flirt while you are around, take this – it does happen, dear. This flirting may even be disguised as a playful friendship between your sweetheart and your friend. Watch out for that constant touchiness as well, they are sure signs that there is already something going on behind your back.