translate from spanish to english please!?

I'd say :

If I love you, the only thing I cannot do is hurt you, and if you're concerned that the opposite may happen, let me (tell you that) my heart was cold a long time ago and my life was very sad when you did not exist. You are the woman who was able to revive my feelings and to fill my life with special moments important for me.

I know it's not very good but still, you get the meaning. You can also try google translate but the translation produced is not usually great for full sentences.

Yes I want/love you, the only thing that I can't do is hurt you, and if you're concerned because that the opposite happens, let me what my heart *era?*edge? from stone a long time back and that my life was very sad when you're not, Is what you the women are able to revive my feelings, fill special important moments for me.

if i like you,the only thing a could do is making u feel bad.if u feel worry ,leave my rock solid heart that has been rocky,my life been very sad when u are not here next to me.its because you,re the only girl that can revive my happiness with important special moments for me

if I want, the only thing I can do is hurt you, and if you're concerned that the opposite happens, let me my heart was stone long time ago and my life was very sad when you are not, you are only women able to relive my feelings, special moments fill important to me.