Taking that ultimate leap of faith?

I have never considered myself much of a risk taker. Usually, I shy away from doing anything crazy. This past year has shown me that I am a risk taker, that I can take leaps of faith and that everything will be alright. A year ago, I moved 3,000 miles away from my family and friends to pursue my Master's in Boston. I came out here knowing only my roommate. No matter how scared I was, I knew I was making the right choice as the Lord had shown me the path I now needed to take and even confirmed it to my parents. Usually, I am shy and would rather fade into the background, but I could not be that out here. With no family nearby, I had to create a new one and that meant making new friends. I put myself out there and befriend people. I developed this great group of friends at church and at school, who I love so dearly. I took this huge risk (moving) and another (stepping out of my comfort zone to make friends), but now this is other situation I am in where I don't know what to do.

Here is where I need some advice. I am going to be extremely vague in many ways, but hopefully what I write makes sense. If not, just call me. I am in this situation where I need to decide to take the ultimate risk by being completely honest about my feelings. I don't know what to do and have spent the past few days contemplating my next step and why taking it scares me. Moving to Boston scared me, but I did it. Making new friends was never easy, but I did it. Why is doing this thing scaring me? I thought it scared me because I was frightened of rejection. However, now I think I am scared of getting everything I wanted. Of being extremely happy. How crazy is that? Why does this scare me? I could be on the cusp of this great thing, but yet, I cannot take that leap of faith. I know I should just go for it. I know I should jump, I really should. I am open to any advice or suggestions. Thanks!!!