Im starting to catch feelings for my friend should I tell her? (Seriously)?

So I've been friends with this one girl for about 10 months she just broke up with her man when I first met her who's she's been with for like 5 years and then she hooked up with some guy as a booty call which she says she can see him as a boyfriend only when he takes her seriously and then there's me the middle man but for some reason I can tell that she may be interested in me due to the fact that thru out these 10 months I've never even tried to make a move on her I've talked to her about girls I've been having sex with and I tell her about girls who I find more attractive and even when we talk to each other I always find her looking at my mouth but that just the beginning all our friends think we are either dating our having sex as friends but in reality we're not we just hang out and smoke and eat and talk a lot of **** lol when everyone mentions that we are dating she says I'm her N I G G A and she says let them keep on thinking that we are doing **** I don't mind because I'm just that cool lol but here comes the part where I think she used me to make her x mad because she wants to make him feel miserable she told him that she loves me as a friend and that we always hang out and I actually think that's foul but I still freaking like this girl but now her friend (girl) gets on my case saying that we look cute together and that we should just get married and I find it embarrassing because I don't think it's a genuine way to give her a hint that I piker her let me know ???