How do you deal with a best friend who has become consumed with their significant other?

I know the easy answer is to say, “Just talk about it! Let him/her know how you feel and arrange a way to spend more time together.” But what if you feel like it isn’t worth the fight? Like maybe if your best friend cares so little about their relationship with you, then you didn’t mean much to begin with. What if you feel like the way things turned out says a lot about their character? Or that forcing alone, “friend” time together turns into an awkward obligation? What if you feel like any effort is futile because they care about their significant other way more than you? What should you do then?