I'm 17, (18 next month), I've now pretty much completed college just got a few loose ends, I have a good set of friends and family. (The only exercise I do religiously is rugby every week).And yet, I have no motivation to do anything. I wake up in the morning thinking 'Here we go again'. I just lie there thinking I really don't want to get up and face the day. Finally, when I do get up, it's a struggle to do anything. I feel so like 'dead' if that makes any sense.
I need a way to motivate myself, as all I'm doing is sitting on my laptop in bed every single day, being depressed and short with my friends. Which I try so hard not to, but I just don't seem to be able to hold a conversation at all.
Most nights, I get into bed, and just cry, I don't know what for, I just can't hold it in.
Any ways to get the old me back would be great.

May be its hormones. But to start a day with fresh approach, you may try doing yoga. It will help with many issues.

Maybe this is one of those 'blues' times in your life. They will happen throughout your life- nobody gets by without those times.

As hard as it may seem, this is the time you need your friends and family. To go from being busy 100% of the time with college, to near zero afterward, is like running into a brick wall. Everything seems to stop.

Allowing yourself to stay in this mindset, is like building a fire. What seems not worthwhile or worth the effort, feeds on itself until it's hard to get out of bed at all. Eventually, people you shut out, will stop calling, and you will become more and more isolated.

Your post almost reads like the end of a relationship. That period where you go through the grieving, or loss of someone that was very important to you, is exhausting. But, it does eventually pass, or at least pass enough where you can see some light at the end of the tunnel.

Where you are sinking more and more everyday, won't get better until you plan a little bit, to do more with your days. Put a calendar on the fridge and make plans. See a friend for coffee, walk around the block, clean your home. Pump a little energy into your life that will build up and build up until you wonder how you ended up so down and out.

IF there is a history of diagnosed clinical depression, or there is more to the story that could be a cause of what is happening to you now, then I urge you to spend a little time with a counsellor, and talk things through face to face. If you have been heading down this lonely road for several months, or you cannot anticipate things getting better- same answer- get into counselling right away.

Whatever you do, don't let this fester.