DivaRx - From the info you've given, you have:
Sun - Can
Moon - Lib
Merc - Gem
Venus - Leo
Mars - Gem
Jupiter - Lib
Saturn - Lib
Uranus - Sco
Neptune - Sag
Pluto - Lib
I'm not going to go into too much detail, and your birth time is necessary for a more accurate reading, which William is much more equipped to do than myself.
A Cancer sun will always have emotional ups and downs. Moodiness is a trait most commonly associated with Cancer. I think a lot of your restlessness may be coming from your Mars in Gemini. I have a friend with that placement, and her mind NEVER shuts down, and her thoughts are often very scattered. She jumps from one topic to the next in conversation, and tends to trail off into irrelevant topics.
In addition to that, you have a stellium in Libra. I won't say a WHOLE lot about this, mostly because I don't want to get in over my head, but I do know that Libra wants balance and equality. With your moods going up and down, and your mind possibly wandering in different directions, it could be making the Libra inside see yourself as "crazy" and unbalanced. *I think* If the more advanced astrologers would like to correct me, they are more than welcome! I'm always learning myself!
I should also mention that you do not have any planets in earth signs. With this elemental lack, you may find that it is difficult for you to feel "grounded," and you may find that you are sometimes out of touch with reality.
As far as feeling alone and isolated...well, both Libra and Cancer crave partnership. In fact Cancer is often considered "clingy" or "co-dependent." You do have a cancer sun, but your chart is predominantly "air." Air signs are often very independent, and don't mind their solitude and freedom. So, while your Cancer sun thinks it needs companionship, sometimes the airy side of you just wants to detatch and be alone. This probably confuses the heck out of you.
I do hope this helps you a little though, and remember, we ALL have difficulties in our charts. You are not CRAZY! You just need to understand yourself better.
Once you have an accurate chart, I'd recommend checking out the cafe astrology website. It's a great site for starting out. You can learn a lot about all of your planetary placements there.
Good luck!
-CC