How do you know when it’s time to give up?

[Squirrel439]

I’ve been with my partner for 3 years, but for the last year to 18 months, I’ve felt like he’s lost interest in me and doesn’t feel the same as he used to. I’m really unhappy but can’t tell him because he gets angry.
I still love him and the lack of affection and feelings are from his side, not mine, so it feels shit. He’s said if he wanted to leave he would, but I feel like he’s staying because it’s easier for him and the practical reasons.
I’m really unhappy, my self esteem and confidence is at an all time low and I don’t know what to do.
At what point do I say enough is enough?

When you can’t remember the last time you were happy.

I think you now it’s now. Life is too short to waste on someone who doesn’t care about you.

Do you have DCs together? Are you married? Are there joint property assets? These will make a split more complicated but not a reason to leave.

I’m really unhappy but can’t tell him because he gets angry
THIS ^ is MORE than enough.
I'm assuming he's living with you in your place?
You are so unhappy that your MH is starting to suffer so please please please end this now!!!!!
You deserve far better.
Do NOT 'settle'
Get out there and enjoy yourself.

You are obviously not getting out of the relationship what you want anymore and if he is unwilling to put in work to stop you feeling the way you do then the relationship has already ended.

Actions are everything and if he does nothing to make you feel loved, wanted and part of a "team" relationship then you need to remove yourself and find someone that does.