Dear sleeplessinvirginia,
First of all, YES, there is such a thing that you can just let it go and “be happy”…
I feel that you may find the book “The Power of Now” by Eckhart Tolle speak to you loudly. At one point of his life, Eckhart said something like this: "I cannot live with myself any longer." (see page 8 of the PDF book below for the story)
Here is a link to free download of the book in PDF:
http://www.holybooks.com/wp-content/uploads/The-Power-Of-Now-EckhartTolle.pdf
Here is part of the table of content of the book:
1. YOU ARE NOT YOUR MIND
2. CONSCIOUSNESS: THE WAY OUT OF PAIN
Create No More Pain In The Present................................26
Past Pain: Dissolving The Pain-Body...............................27
Ego Identification With The Pain-Body............................31
The Origin Of Fear............................................................31
The Ego's Search For Wholeness......................................33
3. MOVING DEEPLY INTO THE NOW
Don't Seek Your Self In The Mind..................35
End The Delusion Of Time..............................35
Nothing Exists Outside The Now....................36
The Key To The Spiritual Dimension..............37
Accessing The Power Of The Now..................38
Letting Go Of Psychological Time..................40
The Insanity Of Psychological Time................41
Negativity And Suffering Have Their Roots In Time.........42
Finding The Life Underneath Your Life Situation..............43
All Problems Are Illusions Of The Mind............................44
A Quantum Leap In The Evolution Of Consciousness.......46
The Joy Of Being.................................................................46
4. MIND STRATEGIES FOR AVOIDING THE NOW
…etc…
I strongly encourage to check out this book.
Wish you well!