>>11 is a douchebag.
>>13 is wrong
If he said "I love you" in the relationship-sense, this is by far the most likely option.
Alternately, he may have feelings for you, be unsure of what/how strong they are, and wants time to figure it out.
Either way, he's being very mature, and you should respect that.
If he said "I love you" in a friend kind of way, then he's really uncertain about the whole idea period.
Or he's lying.