Search Results: no response to phone calls

So I have been dating this girl for about six months now and while things have been good, they have been far from great. When we first started our relationship, things were going quite well, she was a sweetheart, would say nice things about me and never really questioned what I was doing.

That being said, she also would call me on my cellphone, my house phone, wherever I went, she'd get the number and would call to check up on me. Now, while this might seem nice at first, it became quite odd and my family and friends began to question why she felt the need to call me every two to three hours whenever I was free to talk to me.

As time went by it began to become like it was almost too intrusive and overbearing and got in the way of my livelihood, would keep me up late at night when I had work the next morning, was unable to go to the gym because it would upset her that she didn't get to talk to me during the day, etc.

I have slowly tried to ween her off of calling me all the time, I am comfortable with texting as I am able to do other things, like go out with my friends to a game and not be attached at the ear canal, but she will message me on Twitter, Facebook, Skype, inbox me, text me, call my phone, call my house, call my friend's phone until she gets a response.

If I do not respond to her right away, I can be sure that the next time that we are together that at some point, whether it be while I am asleep, showering, on the toilet that my phone is going to get checked to see what I am doing, who I am texting, what I have said. She'll often confuse playful banter between coworkers and friends as flirtatious and has accused me of cheating on her on multiple occasions, which I have not and have no intentions of doing.

I have warned her that her continuation of accusing me of cheating is going to pry us apart and that we will not work out if she cannot trust me and yet she continues to say things that sound like she does not trust me, asking me who I am talking to and tells me not to talk to other girls or cheat on her everyday.

I am looking to generate some more space between us, not emotionally, but in the time we spend interacting because it has gotten to the point where she calls and I'll let out a sigh of exhaustion from talking to her so much.

How should I handle this situation? Am I doing something that is clearly in the wrong that I am overlooking or is she really just far too clingy?