Good People will give you Happiness
Bad People will give you Experiences,
Worst people will give you Lessons
Best people will give you Memories.........

People come and go...I understand, that sometimes, we wish if the people we loved the most, people we need, could stay in our life...But that's not in your hands sometimes...!!!
Fats and luck are the things to be accepted here...If someone doesn't wants to be part of your life, then let them go..there is no need to stress over what isn't going to happen, or isn't going to change....!! Just be thankful for the experience and lesson..
When people betray you, then move on...do not allow yourself to stress on that...just move on..you need not to figure out it all for moving on. Forgive them anyway and set yourself free form the burden.
Instead, cherish and embrace what you have now..The people who are ready to stay in your life and the ones you allowed you to Stay in theirs. They all need your love.. Thank them for the happiness they bring into your life.. Do not wait to tell that you love them out of shyness..Just let them know that you do...

So there's no point in regretting anything in your life...
Its okay to cry, to weep, to mourn, to let yourself dissolve in the pain of losing someone you love, someone who you wanted to stay..But however, let them go..their role in your life is over..try to understand it..You will never be alone forever..there are people who will always love you and those , who love you still..Like your parents...
So be thankful for what you have ...and just don't ruin your present thinking about your past..Your future can be better than your present!
 You are the primary owner of your life...you must not give up..continue to live your life with full enthusiasm.