Hi Wrick
I got a feeling that you have a similar problem to me. For me it was always very difficult to aim for something in life, and my approach was entirely "just live my life till the end". I have accepted the fact that I am just going to finish studies, get some kind of job and just live. No particular ambition, reason, purpose. People I talked with had similar reactions to what u described. It seemed impossible that someone may have no goal in life. Currently I have no solution how to escape that permanent black and gray world, but I am working on it as hard as I can. I discovered that sport helps a lot. I started training regularly by accident, when my friend kinda forced me to go for 1 training session. I wasn't thrilled, but something in me got pissed at myself for not doing anything. Slowly I started practising 1-2 times per week. Currently I am climbing, 3-4 times a week for 2-3 hours. I always have to fight myself to go and climb, but looking back, it is becoming easier and I can see progress I am making which also brings me joy. The second thing that pushes me forward is a curse and a blessing. I am finishing my studies right now, and while looking for a job I have discovered that my specialization is a dying breed on a job market. I was crushed. I spent more than 1000 (thousand) hours self studying in IT route and it won't be very useful. I was really depressed, but I carried on and talked with a couple of friends about what I could learn to get a job. After a month of research I have realised that programming is a really good choice both by market demand and salary. Now, daily, I am trying to spend about 3-4 hours learning how to code. Each time I start, I have a feeling it is all useless, it is too late for me, too much material to learn. Each time I feel like I should just give up, forget about the fact I want to be able to snowboard once a year, climb in foreign mountains, buy a motorcycle, buy a car, buy my own flat! Simply go back to doing something to survive, just live on. When I finish my studing session though, I have a sense of a job well done and in a span of a week, I can certainly see results of my struggle. My climbing and self-studying are small victories for me, but they propell me forward. I obviously feel like shit quite often when my mind decides to remind me I am not working in my newly chosen career, I am already 26 year old, my friends already earn good money etc.
To sum it up - fight this horrible feeling of void. It will be painful, it will seem hopeless, you may cry and scream, pray and beg for some closure, but challenge yourself! Pick up activities to fill your spare time. Stick with them even when it will be almost physical pain. I know how hard it will be to stand by your choice, when all you will feel is just resignation. In new activities you may find the glimmer of light that will become your goal if you stick to it. I was there and I still am. The proof of that is the fact I am here - joined 2 hours ago, cause I felt overwhelmed by my career situation, comparison to friends, my fear of being useless, pathetic man and a long time feeling of hopelessness steming from possible depression.
My last piece of advice is something very true for me - if you feel angry or miserable when looking at your life and yourself, that means you still haven't given up on yourself. Use it.
Good luck! I hope in 6 months we both may report that we are doing better.