Not everyone is exceptional when it comes to expressing how they feel. Some people lack the words and way to deliver how much they love the other person. The majority of our communication is done through body language.
How a person hugs you says a lot about what they think and feel about you. Following is the insight to your relationship:
When a person hugs you from the back that means that they are very protective in nature. They are ready to take that kind of responsibility and make you feel safe at all times and in all sorts of circumstances to come.
In a case where the man has not yet told you that he is in love with you, he will soon do so. The way he holds you tells you how he feels about you. But one has to be cautious about such people; they tend to fall out of love as quickly as they fall into it.
This hug is very friendly in nature and should give you no hope regarding romance. If you are friends with this person, it will remain a friendship. If you are already in a relationship with this individual, then you should be a little worried. This says a lot about how they see you. They might not be with you for the sake of love.