I am not really sure that there is anything worse than when I lost love. It can be devastating to know you are the one who sabotaged the whole thing right from the get go. The only one who can learn to be a better partner in a relationship is you. No one can do it for you, but there is help out there that may make things a little easier. The biggest thing you need is the want to.
This may sound like the opposite of a cliche, but it is true, it's you and not them. The fact of the matter is that many people end a relationship too quickly and then later regret it. You may very well one day realize that walking out on the last person was the biggest mistake of your life. They might very well be the one that got away, and you might always regret it.
Do not make the mistake of assuming that they left because they didn't love you, it could have been that you didn't realize you truly loved them or even that you were afraid of the love you felt for them. Maybe you mistreated them in some way that they could not abide. I know this does little to ease your hurt but at least your pride can be a little less injured with this knowledge. Maybe you can start to understand why you do the things you do that make you say I lost love again.
Sometimes it is just not the right time. Sometimes you meet someone and one or the other of you is on the rebound or just not looking for love. Neither of you may realize it right away and when one of you does figure it out it can leave the other person feeling blindsided.
Sometimes we sabotage ourselves. We ignore obvious signs that the other person just isn't that into us. We pretend they are interested when we know in our heart that they are not. Make sure you are completely honest with yourself about the situation.
You also need to make sure that you are not sabotaging your relationships in other ways. Many people who don't feel good about themselves have a hard time believing that they are worthy of love. If they feel that way, they often push love away without even realizing it. Make sure that is not what you are doing. If it is though, you will eventually want to fix it. Everyone needs love, including you.
Try to honestly figure out what it is that you are doing that is causing you to push love away when you have it. You may be surprised to find that love really is within your grasp you just have to learn to let it happen in it's own time and not try to force it or just let it keep happening and stop trying to push it away.
If any one of these scenarios is the reason you left them it is possible that someday the two of you will come back together. But, do not wait for that day to come. Instead live your life and trust that if it was meant to be, it will be. That is the single hardest thing to do, but it is good advice.
This advice on love may help you sort things out and find the solution to your relationship issues. It is not always easy to face up to your flaws and make changes, but it can be done. Don't give up, realize that you are someone who is worthy of love and follow your heart. You will find I lost love is a thing of the past.