how long can you really hold on to a relationship if all you have is love?

It’s actually easy once you’re apart and living the lives you’ve each grown into separately. My ex husband and I both understood we had changed and let it go easily.

I think the "love" feeling will wear off eventually. You may still like the person and care about them still however.

Love is very important to sustain a relationship. But it is not the ONLY thing. After a while you realize that choices have to be made:

Either you can accept what you’re not happy with in the relationship.

Or

You can make a choice to let that relationship go.

If both of you are not willing to change for each other, the constant fighting will just ruin whatever love you still have.

We must be doing something right. 47 years and counting. ;)

By being actually loving .. love is not just holding on. It is also letting go when you are convinced that is the right thing to do .. when you then hold onto that person .. you are doing it for any/all the reasons other than love ..

it's very difficult and sometimes relationships can hold out a long time. Sometimes forever. You can love someone so much that it's almost impossible to let go even if you know it's the right thing to do. It's cliche but it's important to be open about your feelings and see if you can figure out if there's a way for things to change to make the relationship work and if not then there has to be a conversation about ending it. Better now than in 20 years.

It really depends on if you're both willing to work on this relationship. my own opinion is that people throw their relationships away too quickly, because they don't agree on a few matters.
It's perfectly okay to have different interests, but I assume maybe you're fighting over these differences?
If only one of you is willing to compromise that might bring resentment

You either make the decision to separate and then get on with making it happen or you waste the coming years in an unhappy relationship and live to bitterly regret it. Thats it, two choices, its up to you.

That's a hard one. Feelings come and go and they won't sustain any relationship, has to be more than that. Real love is how you behave towards someone, not how we FEEL. Sometimes better to go separate ways if incompatible and can't work it out.

No idea, but I think some of those relationship end up lasting a whole lifetime.

What makes you two not compatible?

You can't. Love is not enough, and never is. There's no point if there's fighting and unhappiness.