Relation That Came To End Without Knowing

So many people who come in our life, so many relationships we are bounded with, and so many interactions and talk we have,  to keep us delight. But still, we are so freaked out, no idea what's going on, all of us, everyone of us, have been searching, and looking for someone for the real connection, but we don't know, who's the right person to line up with.
Right in that moment, we end up with someone, may or may not be "someone special" but turns out to be someone, we get that instinct hook; and that hook can be of any type, I mean any kind of relationship, with no age or gender or places or even countries barriers. We feel like "yeah, I got someone I can lineup with.." , it feels so good, so-so good that we are relaxed, can forget and go limitless when we are with them or even without them, their thoughts keep us awake timelessly.
 But you know what everything has a expiry date; so even that relation you have for now, got to end. The reason for this end, can be anything, and if there is, then that's good, because at least it can console us. But sometimes, there be no reason, we just end up, get disconnected. I wonder Why! Though I think, I can guess... It's because, we get afraid, we are super confused and nervous, for the fact, wondering is it too much. And without even having a valid conclusion, we come to a conclusion to end it; and between all these stuff, the other partner doesn't even have a clue, they go mad, wondering, "Why?", "For What?!" and "What Did I Do?!" But that's not just about them, because here we are even more confused, super, super exhausted, mad, unhappy, restless, and guilty, and what not, as we, ourselves have no idea, why did we ended with the person, ended the beautiful relation, and then we go back in time, start wondering those conversations, fights, leg pulling stuff and every single moment spent together. We wanna go back for real as well, but then again, No, we think it's too late, and we try to stop our thoughts and those inconvenient feelings. But we couldn't stop our heart, could we?