You know, if I was asked once if I was cheating and I said no and then kept being accused of it, I would be defensive about it. In fact I would probably cut off communications, especially if that was the topic that came up every time we talked.
Think about this, if you were accused of something you didn't do repeatedly how would you start to react?
Now I don't know that you have asked her multiple times or accused her, if not then I might be a little concerned with her reaction. Perhaps it is time to ask her if she wants to continue in the relationship?
It is not an indication that she is cheating if she got angry and very defensive when you ask her. It is a normal reaction specially if she's not doing such thing. You have to talk to her about not being so active of calling and texting you. You have to cite your reason and listen to her also. Faithfulness and trust is very essential in building a relationship.
I agree with the above, but... as the quote kinda goes, "I think ye protests too much." So it can often be a sign of guilt. If it was the 1st time you asked her - & did so rationally - & she reacted out-of-character, I would be lightly concerned. If you're a jealous person & accuse her often of things, then of course she'd get mad. The calling & texting is an issue, unless she's angry. Hard to say w/o knowing how you approached this. But if done nicely & only 1 time & then she's taking it to the extreme a bit. A couple should be able to talk these things through & normally a person doesn't go crazy & stop talking/texting. Heck, she should be missing you, unless you are bugging her. Look, there's an old saying that states we know they are cheating before we ask & we usually know who with. Because when a person has a crush on another, they can not resist talking A LOT about that person. Don't bug her (no calls or texts) unless 1 call or msg. only to apologize if need be --- then wait, even if it almost kills you. If she cares for you, she'll quickly return. If not, you've lost a cheater or someone that can't deal with conflict resolution and best to let that person go.
Sometimes people won't or just can't face someone when they're trying to drift away. They'll try to show it in many different roundabout ways rather than just coming right out and saying it!
Some subtle telltales are: Is she wearing more make-up than usual along with the "I'm available" clothing? A new hairstyle? Does she want to get or use her own car now? Does she always seem to have her own ride?
Sometimes it's simply the way she returns kissing or maybe a loss of intimacy altogether.
Does she talk about future things to do together anymore?
When she knowingly becomes more and more unavailable and is aware that it might be hurting you...or merely continue to do it despite your feelings?....well!!!
If it's just the three out of all the telltale signs, I'd say it was a good chance she's trying to get away.
If it looks like a duck and walks like a duck....!
Or maybe ask yourself if you may have done something majorly hurtful to her in the past to send her off into another direction? Could she be retaliating?
Tell her you have a gut feeling something is wrong and your concerned and have to know! I wouldn't use the word CHEAT again! Try DRIFTING instead! Ask her point blank, Is there someone else?
If so, You can still spin it around with a lot of work but only if you both feel together that there is really something special there worth fighting for.
And finally sometimes not all couples are a match!
Remember to always keep you head high though! There are so many beautiful available woman looking for you too! Maybe it's time too get back in the game.
If you continue to see these signs that hurt you then and not willing to reconcile you differences then maybe it's just time to tell her your moving on!