'He was flirting with another woman on Twitter'

I recently logged on to Twitter and found that my boyfriend was flirting with another woman. When I confronted him, he said he didn't even know who the person was or where she lived. I don't know why this makes me jealous, because I am usually a rational person. Was I wrong?
If something bothers you, there's nothing wrong with expressing it. Maybe you can both define limits for online behaviour.

My girlfriend and I have been on again, off again, for over four years now. Every now and again, we think it isn't working out, go out with other people, then end up together again because we are comfortable with each other. We are both a little confused about this because, on the one hand, we believe we should both move on and meet other people but, on the other, we definitely feel as if we know each other well enough to just be together. It's frustrating because we can never really take this to the next level, which is what we would both like to do. What can we do to figure out where this is going?
I suppose this is just laziness on your part and hers, because the two of you have a level of comfort with each other. I hope you both realise that this comfort is hard-won though, and takes people a lot of time and effort to arrive at. What happens next is entirely up to you both, because you need to individually figure out how important the other person is in your lives and, more importantly, whether you want to give up what you have in favour of something uncertain and unpredictable. If you feel that this can never work out, then meet new people by all means. If, on the other hand, you think you have something worth fighting for, why not put aside your differences, figure out why you end up splitting every now and again, and seriously try to make this work for a change?

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