I don't regret the decisions I have made over the course of mine. Each and every one has played a part in bringing me directly to where I am now. I believe we get exactly what we need, good or bad, when we need it.
Same with the relationships in our lives. Some are lasting, they grow and change over the course of a lifetime and some are only temporary but still important.
No single person or experience defines us... but the sum total of all makes us who we are.