Happiness truly starts with ourselves, first and foremost. Don't just date for the sake of having someone to date because you don't want to be alone. Learn to be happy being by yourself first and love yourself before you can learn to love someone else.
You fall, you rise, you make mistakes, you live, you learn. You're human, not perfect. You've been hurt, but you're alive. Think of what a precious privilege it is to be alive - to breathe, to think, to enjoy, and to chase the things you love. Sometimes there is sadness in our journey, but there is also lots of beauty. We must keep putting one foot in front of the other even when we hurt, for we will never know what is waiting for us just around the bend.
Every single fight in your life has had a positive outcome. Every dark place has made you who you are. You couldn't see that in the dark times but afterwards it all made sense. Keep going. God has a plan for you.