Mostly a: He absolutely and totally in love with you and of course you love him too. However it seems that he may the possessive streak and may not give you much space. Be prepared for that.
Mostly b: Well, there is no doubt that he likes you and he likes you very much. In fact he is all set to take the relationship to the next level. Be prepared, for it can be anytime now. But if you are not sure, then this is the right time to back away or you may end up breaking a heart.
Mostly c: Both of you are testing waters at the moment. You do like each other but both are wondering if the relationship can go to the next level. Well, you will never know unless you try. If he remains hesitant, you go ahead and take the first step forward. See if the relationship has any future.
Mostly d: He has found a friend in you. He does not have any romantic inclination. As far as he is concerned, you are the one with whom he can share everything. Time to back away if you do not want to be just a friend.
Mostly e: As far as he is concerned, you are just one of the guys to him. He does not see you for the woman you are. You need to understand that and look for love elsewhere.