I couldn't agree more. If your unhappy/depressed/hurt and you just continually push it aside, just go to work, pretend to be happy, come home, go to bed and do it all again, your life will seem pointless. It got to that point for me, where i was pretending for so long, and i just couldnt do it anymore. You need to deal with issues as they come up. Own your feelings, whatever they may be. Identify what the problem is or what you want to change in your life, work out a solution, and do it. If you need to be depressed for a day, a week, a month, do it. But then move on.
The reason you get these feelings is your heart and intuition trying to tell you that it wants something more. If you ignore the feelings you ignore the chance to better yourself.
And there is more to life than cars and guitars. Not that they arent important but you should feel like you have more to offer and more to gain from life than these.