How do you know if she/he is "the one"?

ive always felt every boyfriend i have as "the one". unfortunately, im often misled and i end up disappointed that the guy is not really the one. it had been 3 false the-ones for me. and now, i openly share with mylot that i have a really miserable relationship with my partner. you know he isnt the type who walks the talk. he just always begs me to stay with him through thick and thin and no matter what. i dont know what's with him, he wouldnt tell me everything. but his actions doesnt really imply great interest in making our relationship work. i mean, i realize its not all happy times but 80% of it is really making me sad... but i tell you, regardless of everything that happened, i really believe he is the one. might sound like a fool blinded and in love, but something is telling me to stay with him. it was really impossible for me to do so, especially not with the feisty personality i believe i have, but i stayed with him anyway... no matter how miserable it has gotten for me, ive always known il be spending the next years of my life with him. am i sure he is the one? i have yet to explore and see how it all ends...

when I first met my husband I thought he was handsome and had a great butt and something told me he's gonna be my spouse. Than about a month later I kind of got bored with him. But something deeper within told me to stay and give him a chance. So I figured I'd make him watch spongebob series every night he would come over. We did this over a year and ya know what. He stayed thick and thin with me. So I knew he was the one for me. He'd make me laugh and he would stay no matter what put in his way. And right about two months before we got engaged I found out he lied to me about something dear to my heart. And I decided that we should break up. The day I decided this I was at work and figured I'd tell him when I got home. That same day he got into a car accident and he called me to tell me. My heart fell the tears couldn't stop pouring I left work right than and ran to him. And knew I couldn't live my life without him in it. a few months later got engaged and 6 months after that we got married. Now we've been togetheir for about 10 years and married 7 years and I still love him. He's made my life complete. So to answer your question I believe that you know if there the one if you can't see your life without them.