How to differentiate between “inner voice” that’s telling me to break up and Intrusive thoughts

So I keep getting thoughts like “maybe we are not compatible”, “maybe we are just friends” “maybe I keep ignoring my true feelings and I want to break up and be single/ be with someone else instead”. I try not to react to these thoughts, to not ruminate and figure things out. But I have a question: How can I know that what I keep ignoring isn’t in fact my “inner voice” telling me I really don’t love him anymore ? I think we all know have heard of these couples who have been together for years, living in an unhappy marriage when there’s no live anymore but both partners are to lazy/scared to leave, even if it was the right thing to do. Now, If i always use the stragety of “no reacting today, but posponding the decision of eventually breaking up”, won’t that lead to the exact same situation ?

Another example. Let’s assume you don’t like playing soccer. And no matter how much you try, you don’t find as much joy in it as all your friends. But instead of listening to your inner voice and stop playing soccer because you have a feeling that you might enjoy playing chess instead much more, you keep telling yourself: “having fun while playing soccer is a choice. I will keep pushing myself into it, even if it feels wrong everytime I do it, until i finally have as much fun as what I think I am supposed to have ” yet

It really triggers me to hear that befriended couples broke up because one of them “didn’t have feelings anymore” or because they “were not compatible”. I always wonder if I am just too scared to take a final decision and if I keep ignoring my true feelings while trying to convince myself that I have ROCD.