You know what happens to people that are left out out of heartbreak? They stay inside their boundaries hopelessly waiting for some magical figure that could help them escape their misery. I reckon people don't always get a lot out of heartbreak. People don't get a lot. Events like these need thorough redemption as it could spook any one whose ever been broken later on in life. It just builds up. Just like that. Unlike people that have gone far to actually pertain their principles to not be a victim of heartbreak, I bet they have some sort of power of surpassing it either through neglect or actually confronting the source. Anyways, in my experience heartbreaks happens when a person realise that we have certain special feelings towards a person. I remember my parents telling me that a lady should never show that they are attracted to a guy before the guy makes a move. I think what they're trying to say is don't do anything stupid to obtain a goal that is unexpected such as being liked back. But anyways, to this point I realise that they're right in some ways. But what happens if you don't try? Don't people always say that you'll regret any opportunity that happens to be right there in your face but you just decided to chickened out??
Think about this, if you don't try to have somebody in your life, to let a person become a part of your heart because you're too afraid of being brokenhearted again, you're not living. You'll miss a possible experience of extreme joy or even worse, you might lose your actual soul mate. I don't think there's an issue in deciding for your heart. You can take in many suggestions as possible from people you trust, but still, they don't know your true feelings towards a person. You'd be the one that go along the journey. I say take a chance. If all fails, at least there's no regret in never trying.