living with my ex

Its been a while since I've been around but not too much is changed. I am living with my ex-girlfriend still. I broke up with her 2 years ago due to a lack of physical intimacy; there was a lot of kissing, cuddling, touching but nothing much under the cloths. (she's a virgin still but not religious). I suggested living together still, to save money. I am 36 and she is 32.

These last couple months I look for any excuse to touch her, holding her and touching her skin. And sometimes she does the same; a month or two ago she caressed the side of her face against mine on both sides, I dunno why; I was surfing online at the time and I think she was looking at what I was looking and just doing that. I asked her what she was doing, and she just smiled and said admit it you liked it!

Lately she at times seems more flirty. While over a year ago she would sometimes wear a white shirt (in the house only) that had longer under arms to see into her shirt. I could only mostly see but not fully see in and made a joke and she laughed and from there on wore something underneath the shirt when she wore that.
Even though she knows I look, and when notices I'm looking these last few months she just smiles and says now 'your a man'. So as if to say, your going to look, cause you enjoy what you see. And has a night gown that's very sexy, little white thing she sometimes wears. And I tease and when I see her in something less revealing I say I like the other outfit better. Which causes her to smile playfully and make a joke. Our relationship, albeit friends/room mates, seems playful and flirty, and she often makes little jokes when she thinks I'm looking a bit less at her eyes and more on her cleavage or butt.

Over the last few weeks she's been seemingly more different, see what you make of it.

Oddly enough she now has a new favorite green pj type outfit. Its more revealing then the others. Although it is very humid where I live right now and hot. The outfit doesn't show much cleavage in the front but on the side is another story and it barely covers her butt. I actually once suggested she put more on around the house, though I don't really want her to.
Once she came in my room with the outfit on, and was reaching to open my window and I could see her whole breast. When her mom came down for a visit from out of town I offered her (my room mate) my bed (I slept on the couch). And as I was waking to go to work (this was all a week ago) she came out to check outside what she though was a starling bumped into the window. She had on the little green outfit and she said "mind my bare legs!" and she teasingly smiled and looked back to me as she went outside and said 'not that you mind!' she knows I'm looking and that morning she had no panties on underneath and during most movements she made I could see her bare butt. When she came inside she must have noticed (or maybe she already knew I dunno) and put something on underneath.

The next day she bought a nice sundress and she looked great in it. Her mom asked if I thought the dress was beautiful and I said I did and she said what about who's in it. And I smiled and said the same thing and she (ex) popped around corner and said I walked into that one, and smiled. She asked me later in the day about the dress again and I told her I loved it and she said "and you like what's in it?'

A friend of mine suggested kissing her and saying that she's amazing and I couldn't picture my life without her in it. I never tried that kind of spontaneity when trying to start a relationship, more just straight forward verbal. So that about covers it although sometimes when I'm sitting in my chair researching something online she hugs my head to her chest. Maybe its all just friendly flirting but she hasn't dated anyone since me or shown any interest in anyone other than me that I know of. And I should note she's not normally flirty like this. When I give her playful slap on the butt she smacks mind several times.

A friend of mine suggested kissing her and saying that she's amazing and I couldn't picture my life without her in it.

It sounds like decent advice until the "...I couldn't picture my life without her in it" part. She hasn't earned that yet in my opinion. At the earliest tell her that after you've gotten to home plate.

Remember also that she's kind of a sexual flake and that there's a significant chance that she'll revert back to being a flake if you show her too much attention. Women lose interest in men who make themselves too available. If she had truly wanted you, she could have had you during all that time you were available to her while dating.