I wanna know what is going on?

Okay so I have this ex long story short we dated off and on for 2 years then she stopped talking to me out of no where and she got married to a guy she knew for 4 months roughly well she moved 2000 miles away from me then and now she is back and her husband is on deployment for a year hes been gone since January I believe? Well I was in contact with a friend of hers after she cut me off and wouldn't talk to me so I knew this info well she suddenly decided to "hate" me and told people I "stalk" her because I did try to contact her because well 2 years is important and I missed her well I recently got a job at this gym well since she moved back to where I live and she is from it just so happens she works out at the same gym well I saw her there and she realized I work and workout well the thing is she knows I'm there so if I "stalked" her why would she still come! Another thing the other day she watched me workout as I mind my business while I work out but I look to see if she is looking and she sure is well the other day I was not facing in front of me and she literally ran into me on purpose she was facing forward and when I turned my head to face forward as I walked BOOM there she was and yesterday she watched me again and when I would get near her she would get red and look super nervous so can someone explain what she is doing like what is going on and then today she was at the gym again and this time she again kept watching me then I used a treadmill near her and she didn't move until her friend made her to go workout with her but then I was working out in the free weights and my ex decided to walk all the way around the gym just to make sure she walked right past me but as she walked by she looked down at her Ipod/Iphone then looked at me and looked back down with a smile on her face and then she was working out and talking to some other girls in the free weight area and I caught her staring at me and looking and watching even using the mirrors to do it she did so what is going on!

Well what is going on is this is the longest sentence without punctuation I've ever seen well what is going on is this girl/woman is a married lady acting like a 16 year old well 2 years is not so important it being an ex and all and well you didn't need to contact her it's ancient history well all this looking and bumping into and game playing is well like so junior high well she is probably wanting you to make a move so she can make her stalking claims real well what you should do is ignore it well don't know what is going on except she is bored and wants to stir up trouble well if she is ex you should leave it alone staring walking out of ones way is game playing well think of her deployed husband and well don't' encourage it so well see ya

Pretty obvious to me that this lady is attracted to you. I mean, she dated you once before and now she is acting very interested in you.

She sounds like trouble if she "stopped talking to [you] out of nowhere" then married some other guy 4 months later she probably dropped you to start seeing him and now she wants to drop him and move on or back to you. I guess you dated her for 2 years so you probably know her better than I do, but from what you described I think she is trouble.