Bad situation with a female friend?

She's a really special friend.OK so we've been intimate twice in 3yrs.Recently she's being very attentive.l've let her know l'm not interested in any commitent.With anyone. Still she's buying me expensive "gifts" for no reason.How can l get through to her that l'm not the guy.Without hurting her. She's a special lady and l want to be her friend.Like before No way will l mislead her.So anyone with any ideas