How can I show my boyfriend that he means the world to me?

I’ve been seeing the greatest guy for about a year now. We’re incredibly close and I love him with all of my heart. We tend to give each other a lot of gifts (ranging from m&ms to high end electronics). I’d like to get (or make/write) him something that shows him how much he truly means to me and that he’s my soul mate. I’m looking for creative ideas. Also, we’re saving money because we’re moving in together, so money is kind of tight now. Any thoughts?