Zoning out? Am I overthinking this?

The world's not supposed to be seen or lived alone. After all no one wants to die an old maid.Hence there's a constant need of a companion. And this companionship, we try to seek in everyone and everywhere.We need someone , we want someone. Always. Just to be there for you , to listen to you whine about what pathetic piece of crap life's throwing at you or to talk about the new crush and the juicy details( You know the phase when everything is new and you swear it's true ) Or when you rekindle with an ex-flame. Oh the sparks, The walks down the memory lane and the zillion remember-when's. Oh the nostalgia. You begin to behave like a teenager in love for the first time or probably the zillionth time. Fickle minded lot they can be. Nevertheless, we start treating a particular person like our diary, we might have a tough time writing in a diary everyday but we wouldn't forget to call up or text every single detail of our life as and when it happens. The bitching sessions of that particular girl you don't like or the obsessing over the cute guy you met the other day. Basically sharing everything with them and by everything I mean EVERYTHING. We don't exactly need their opinion though we take them into consideration and end up making our decisions based on them. Especially in relationships but the new found -forever- love takes the best of us. This goes on for a while. Everything goes on well. You have everything even your pillars of faith. But what if one fine day they wake up and decide "Okay! I don't need you in my life. I'm going to zone you out." Ouch. And this person  this pillar of faith could be anyone literally ; your inseparable sister  , you best-friend for life(BFF) or that friend you just considered so much more than a random friendship. They do manage to throw the busy card. But it can only be true for a while and there's only so much one can take and all it's going to end up to is one lousy call or probably a text on your birthday and that to usually late. These are the same people who would wait up on conference till 12:00 on the clock and wish you 'HAPPY BIRTHDAY' together or even surprise you at your doorstep. How much time takes away from us! The moving on , the growing up! Is that all it's about? parting ways from someone you knew all your life? These people who once swore would be there by your side with no conditions or demands just decide you are no longer important to them anymore? and they'll just end up being in your memories. Walks down the memory lane? strike that ,nostalgia ? double strike that. Will they even notice if  you disappear? Overthinking ! That's going to be an epidemic in the coming years if it already isn't. No one gains anything out of overthinking. But then there's only so much one can do , people too reach their saturation points. These people do come back to you but probably as the last resort or when they have no one else to talk to or probably are bored out of their dumb-witted brains and by extension lives and come to you for the entertainment quotient.But in the end it works out for the best. They, though, take a fragment of you something that you might never get back. You just learn to live it. Learn to accept and not to expect and even if you don't there are so many people out there , you meet new people and the cycle continues.