Remember this is your boyfriend and you care about him. Sexual intimacy is a nice way to be together and give each other pleasure, it's not about pressure or responsibility. Take him on a date - dinner and a movie, and then suggest you go back to your place. Or suggest a Saturday afternoon nap and let affection develop into sexual things. Or, heck, send him roses with a card telling him to meet you in his room at 8pm that night, and meet him there with candles and a bottle of lube.
Romance varies from couple to couple.
Doing kind, fun, affectionate things keeps the fire lit and helps make sex an easy and loving experience. Another important thing to note is that you say you DO feel in the mood. If you said you never felt like being sexual with him, this answer would be very different. But you say you do, you want to be physically intimate with him. You want him, he wants you.