I will be short.I've been in a Long Distance Relationship for 3 years.When we met,several days later we exchanged pics.Now those weeks I thought of using TinEye to see if it was legit.The pic she gave me was not of her,but of Leda Muir.For 3 years I tried to be the best boyfriend and this is what I get.I've been catfished and hornswoggled.I feel like a total idiot.

It's not that big of a mistake.
Of course it sucks, but you're not really an idiot. Even if you meet a person face to face, they could tell you lies on end and you wouldn't know it unless someone else tells you. On the internet, where your face and name can be as anonymous as what you ate for supper in real life, it's not really hard to keep that lie going. However, you should consider to doubt people you haven't met in person a bit more.