You should ask questions! Ask the same exact question u asked her! Tell him he is making you unsure. I dunno why people find it hard to ask such questions and want to leave in silence! It's the truth and the truth only leads to a better solution. Tell him that even tho he makes excuses things have clearly chnaged between you and that you are not sure about the two of you anymore and if he atleast doesnt seem to care much, break up with him. This helps you avoid mistakes and or misundertandings