Why not organise a special evening for you both, something nice and romantic, cook a nice meal and light candles and such.
Maybe with the special atmosphere and a more romantic setting and him seeing the effort you've gone to might help you both to express your feelings better.
Or maybe consider a nice romantic break away where you can spend some qualify time together and see how things go.
Whatever happens, don't push him, just because he might not feel as strongly about you now doesn't mean he won't, just don't let any worries or insecurities affect what you have at the moment, try and relax and just enjoy what you have and if it's right it'll develop nicely in its own time.
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