Likely you are looking at the screen in tears crying over what could have been and getting ready to break up with him. Seeing your boyfriend cheating in your dreams is not proof of him cheating at all. The only thing it is proof of at worst is some complex emotional problems permeating your interactions, but this is something that occurs at a fundamental level in all relationships, good and bad. So relax, breathe, and read about what might be causing it.
The first and most likely reason you are dreaming of your boyfriend cheating is because you feel neglected emotionally or physically. Your boyfriend may no longer have the same sex drive that he once did or even the same drive to be close to you and cuddle with you like he did in the first few months of your dating. It is also possible that he may spend fewer and fewer nights with you every weekend so that he can go out and have fun with the guys. It is tempting to think that he might be cheating but this is probably not the case.
Even though it hurts to hear it, a relationship needs to go through trials like this. What is happening is that your boyfriend has finally found a comfortable place in your relationship together. He sees you as a close friend and lover and respects and loves you, but he needs his own space too. You two are not married yet, the two have not become one, so he is exercising his freedom. It may sting to know that he doesnвЂ™t want to spend every waking second with you but chances are, you arenвЂ™t far away from experiencing the same sensation. This is just what happens when couples grow comfortable with one another. On the other hand it can really be a severe emotional neglect that you are experiencing rather than a superficial one. If this is the case you might want to have a talk with your boyfriend and decide together just how important the relationship is to the both of you, so that at least you can both have some all important perspective on what is going on here.
If you dream that your boyfriend is cheating it is usually because of anxiety over thinking that he actually is cheating. Unless you have actual tangible evidence of this though, then this usually comes as a result of self esteem issues. Try not feeling so sorry for yourself and seeing what it is like to think of yourself is beautiful. If your boyfriend is so great, try to see yourself how he sees you. He isnвЂ™t with you for no reason and you must be attractive to him, so just relax and try to pick out the things about yourself that are good and beautiful and pretty. You deserve to feel good about yourself.