The heart of the path is quite easy. There's no need to explain anything at length. Let go of love and hate and let things be. That's all that I do in my own practice.
Relaxation is one of the most complex phenomena - very rich, multidimensional. All these things are part of it: let-go, trust, surrender, love, acceptance, going with the flow, union with existence, egolessness, ecstasy. All these are part of it, and all these start happening if you learn the ways of relaxation.
There comes a point in your life when you realize:
Who matters,
Who never did,
Who won't anymore,
And who always will.
So, don't worry about people from your past, there's a reason why they didn't make it to your future.
To attain something desired is to discover how vain it is; and…though we live all our lives in expectation of better things, we often at the same time long regretfully for what is past. The present, on the other hand, is regarded as something quite temporary and serving only as the road to our goal. That is why most men discover when they look back on their life that they have the whole time been living ad interim, and are surprised to see that which they let go by so unregarded and unenjoyed was precisely their life, was precisely in expectation of which they lived.
What I know for sure: Having the best things is no substitute for having the best life. When you can let go of the desire to acquire, you know you are really on your way.