Traveling with a friend can be a blast, or it can be an immense disappointment.
It all depends on how well you get along and communicate, and how much you each gain by having the other around.
Are you just there because you have to be, or have you chosen to be around this person? Are you benefiting from their company, or are they getting in the way of you seeing and doing what you want to see and do?
This doesn’t just apply to travel-buddies, it applies to the people you surround yourself with EVERY DAY.
Life is too short to spend it with people who don’t inspire you or otherwise make you happy.