I have done the same thing.
I was it seemed the one to always make the move and encourage them when things were not going well for them.
When things picked up then I may not get an e-mail back at all so I would e-mail them all over again.
I finally decided my friendship did not mean as much to them as it did to me.
I just decided to let it go and if they want me they know how to get a hold of me.
I just finally decided to move on.
To a certain extent, I agree with you - sometimes it seems like we can dump so much love into someone, and they enjoy us for a little while and then ignore us.
I don't think they do this on purpose. God has given us so many different "personality types", and it is a fascinating study. Some people truly treasure friendships, but
can't remember to send cards, to respond to us, etc. Its their nature. It doesn't always mean they are trying to shut us out, although this can happen.
There are four distinct personality types (with, obviously, various combinations of the four!) One of these "types" tend to write letters, keep in touch, do thoughtful things, etc. They can't help it. Its engraved in their system. Its so meaningful to them, whereas other folks don't seem to understand the necessity of all that.
I remember birthdays, anniversaries and other such occasions; I send cards for various holidays. Whenever I receive a letter, I promptly sit down and scribble a reply, and its hard for me to keep it short.
My friends don't understand. One has not written in years, and only emails "now and then". She loves me, though, and is overjoyed if I can manage to visit.
Another friend has requested that I "space out my letters"; apparently she feels guilty when I send a reply immediately after I receive her cards. I know she's my friend, as well.
Don't ditch a friendship just because its hard to communicate. You might have to put up with some silence (sigh) but find out their true intentions. They may just have a "personality type" that makes it hard for them to write.
If anyone is interested in info on Personality Types, I'd be glad to recommend some sources (many of them Christian.)