This my lovely readers, is the slow fade.
Why does it happen?
I can't answer with 100% sure-ness, but I can say that it could be a pleathora of reasons, such as:
1. New Crush or Love Interest
2. No Longer Interested
3. Actually Busy
4. Was Playing You from the Start, Got What They Wanted and Moved on
5. Too Cool for the Cookies You're Selling.
6. Know that They Cannot Sustain the Relationship
Essentially in case you were wondering, there's nothing you can really do with the slow fade once you see it begin to progress, unless, the other party is still in fact interested, because once that slow fade gets to the point of a week or so without communication, you need to realize that it's over.
The slow fade is just a part of relationships in life, be they friendships or romantic. You know those friends you had from classes in college or from a work place that you were close with and then as you moved on, so did they? It's the same thing that happens with romantic slow fades.
A friend of mine once met a very attractive man who would text her and say let's hang out and they would try, but somehow he'd always get caught up with friends or the traffic would be too bad, or he'd completely forget. So, if we can't do anything about them, then what do we do? Well you need to establish a set amount of times of epic let downs (not meeting, not calling, m.i.a.'s) that you're o.k. with before you decide that it's time to move on. Essentially what I'm trying to say is that you should decide how many times a new crush is allowed to bail on you before you call it quits. I usually give a guy the benefit of the doubt 3 times before I say this is the last time, but this is your life and your decisions.
This isn't like a set book or a set guideline. All I can ever offer is suggestions, but this is something that I have established for myself, before I give up completely on a new flame.