He said I love you!

A guy who Ive been dating for about 2 months said "I love you". I don't know what to do he's kind of pressuring me to say it back, plus he's much more emotionally attached then me and wants a serious future with me. I just have no idea what to do or how to respond to him when he says it. I do care about him but he's just so much more invested in this than I am.