Cold Hearted

So I've been thinking a lot about the prophecy in the scriptures that in the last days "men's hearts shall wax cold." I used to take this too literally, and serve it up as a way to blame "men" for things... but something hit me the other day as I stepped back and looked at my life (due to an apathetic reaction to something that has usually evoked emotion). Because we live in a world that is so full of temptation and evil (not to be a doomsayer, because there is great good too), but I've learned that to keep pure that I have to train myself not to be affected by certain things... however, a side effect is that I am more stone-face and have a harder time feeling emotion.

I'm so much more apathetic and it does have a lot to do with the protective walls I put up. In the church, there are more and more mid-singles (people not married in their 30+) and perhaps this protective coating is the reason why. However, it is a catch-22. If I let my walls down and allow myself to "feel" things, there is a possibility that I might make some mistakes and need to repent. If I stay the way I am... apathetic and safe, I am without love in my life. What should I do?