I suggest looking at it as a very long term approach....you have actually came a long way already in a pretty short amount of time !! Don't be in too much of a rush with it, and just pick a card here and there- this will take longer, but it will be lighter on your bank account and it makes the anticipation of getting the card(s) that much more exciting (to me at least).
If you've just completely lost interest in the cards themselves, as someone else suggested, there are 1000's of other cool sets/cards to collect. Maybe you would enjoy type collecting?
Good luck- IMO keep going, don't let it beat you
Sincerely, Clayton