Friendships

I am at the crossroad of yet another friendship again.
I realised I am not very good at handling relationship. The flair for it is nearly zero.
Time and again, I have to deal with it and I havent manage to find a way to minimize my emotional damage.
Still like a kid, not handling it in a mature way.
To me, rapport building with people was never easy. I only let a few into my inner circle as MBTI would have put it. Relationship building is never easy for me and I treasure any relationship with anyone. I tried to keep up with the relationship maintainance, at least I did my best.
Close friends are hard to find. As time passed, people will change in terms of personality, looks, social circles and etc. Therefore, the nature of the friendship changes.
Efforts are made to accommodate all these, never mind the infrequent catching up and work issues. In my opinion, friendships are like this, if it is yours, it is yours. It is fate that people meet and click and form a friendship. You work hard to maintain it and try your best to keep it.
But a relationship need 2 parties to communicate and maintain, not just one-sided. Things will always crop up but one has to try to find some time to make it work. It can't be coincidental that everytime you ask someone out, the other person is not free. It simply sound like the person is trying to avoid the other party.
Why?
Precisely of the dfference between people.
The eventual result of such relationship is drifting apart and dissociate ties then.
That's why I wonder, is the difference so great that one cannot accomodate another, not even on the account of several years of friendships that each other had.
I simply cannot understand.
I know that people has to work, has to have their own social circles and etc. They are tired and has nothing else in mind but to rest.
Normal friends can be as such. The requirements may not be so stringent.
But close friends. How can a pair of close friends not meet for 6 months, given the fact that both are in the same country?
Is friendship so not worth keeping it?
On the other perspective, may be I am very paranoid and possessive, possibly even "sticky" as chewing gum. Maybe the other party has a boyfriend and has to manage her time carefully...
Of course, friendships cannot be compared to imtimate relationships like couple had. That I can understand.
Maybe the other party needs more time for her dream fulfillment.
Maybe...
Maybe...
Maybe...
Maybe...
There are so many "Mabybe"s that I dont know it exist.
I feel quite disappointed. It feels like an warm gesture of extending a hand for handshake has been slapped away or not been reciprocated.
Quite sad...
Worse of all, I feel very bad as I myself have not improve much. Like not much growth, mentally. Unlike others, who improve by leap and bounds.
But how to deal with it?
I have not figure it out. The best way I tried so far is to forget it.
Minimize and blot out the image.
Any other methods to try?