Guard your heart?

I was thinking this morning during my run what that scripture is all about...guard your heart... I mean, we are always throwing that phrase around, and probably the only time I have heard it was in reference to guarding it in relationship. But I am starting to think that we shouldn't do that. I mean, we need to be careful to whom we are giving our heart, of course, and to be wise about our decisions, but to tell the truth, my heart has been broken so many times, and the Lord has come and healed me. I've been disappointed and felt shattered and felt like he didn't care and He was just leaving me out there alone. But I want to continue to love.

He promises to come and heal, and He always does it. I just don't want to be the kind of calculating Christian woman who never gets excited about a guy, never lets her guard down. Because that just wouldn't be true to myself. I think we need to guard our hearts against things and people that will drag us away from the Lord, naturally. But guard our hearts against loving? No, I want to be the kind of person who loves freely, with her whole heart. Maybe to only have it broken into pieces and to have Jesus come back and put my heart back together again...Jesus is the perfect example of that. He gave his heart to people He KNEW would betray him and hurt him, and He didn't hold back. He loved with all that was in him. And aren't we called to that, too?

I might be totally wrong and messed up in my thinking. But then again, I know I can trust the Lord to continue teach me in this..any thoughts?