am i being used

about January this year i was helping a friend move house,another one of her friend's came to help,i think she realised i was a decent handyman/organiser,and asked me to get her house ready for sale,when I arrived the following Sunday it was one of them house's where things went south years ago,i dont think she'd asked for help off anyone before, probably never had guests for years. what started as a Sunday morning progressed into a 5 night a week thing, plus shopping trips,dance lessons yoga,ect,we both enjoyed each others company. we had a massive argument last night,she keeps me seperate from her friend's, she went to a party, i played taxi, taking her there and picking her up,it bothers me the way im kept seperate and never spoken of,i feel if I'm good enough to help and she looks for my company, why feel embarrassed to mention me.