how am i supposed to move on?

three weeks earlier
well, the story is as follows:
i spent A LOT of time trying to solve a problem with C
if learning programming requires practicing
how am i supposed to improve my programming skills if i can't solve some kind of impossible-solution-looking problems??
within the time i was practicing, there was a problem which looked at the beginning so hard to got it and also there were some following problems related to that one and they looked much much much harder.
the thing is that i couldn't till now solve that damn problem
how am i supposed to learn if nothing seems as normal as programming >.<
and how am i supposed to move on if i'm stuck for almost a month and half still trying to solve that issue?
i'm really confused
and this really depressed me that i'm starting to hate the whole programming thing if i couldn't move a little single step forward.

any suggestions/strategies to follow??
or am i just a stupid person and not made for programming. *Whisper* i'm really scared of being that >.<

sometimes it really gets so hard to figure it out
and makes me feel im totally stuck and can't go any longer
when should i worry about my improvement way and when shouldn't i?
there must be some points. i can't make sure that i'm on the right track
i don't want to fail solving a problem which i already passed the level of.
it feels bad. i experienced that many times
don't feel like skipping any problems facing me to be sure that i'm doing well
=(