Focus on right now. You aren't going to grow by constantly focusing on or crying over pain you've felt in your past. Everything happens for a reason and it's all to put you on track to get to the place you're supposed to end up at in the end.
If something feels wrong, end it. If it feels right, enjoy it. You don't know how long the good times will stay, so cherish the memories as they come. When times are tough, know that they will not last, so embrace the lessons that come along with them.
When someone offers you a hand, hold it. When they offer you a shoulder, cry on it. When they offer you an ear, speak to it. If someone offers you none of this, know when it's time to let go. In the end, you are all you have. Let go of the extra baggage weighing you down, and let your mind be free.
Focus on right now because it's the only thing that's guaranteed. Be at peace with where you're at, but never stop learning and growing. You're going to get stuck at times, and you're going to feel lost. You don't need to feel that way forever.
It's been said that the journey of a thousand miles begins with a single step. Take a baby step even when it feels like a hundred miles. The next step will be that much easier.