FWB or actually a relationship?

I have been with a guy for 4 months. He wanted to be exclusive, always asking me if I am happy, satisfied and if we get in an argument he says he doesnt want to end this. I spent the last 4 days at his house and we are inseparable on our days off together. I have met most of his family and he has some of mine. We do lots of different things together such as golf, mini-golf, camp, etc. We even have been camping with my children. I have been invited to family get togethers. He family introduces me to everyone as his girlfriend and he never says different. Are we just FWB. We don't have sex all the time, though it is part of a normal healthy relationship? We have even shared keys to each others apartments. FWB or on the verge of hearing i love you