How do you stop worrying about being dumped for someone else

[Isaidwhatisaid1]

I know that worrying is pointless as I have no control over it. If somebody decides someone else is 'better' then they just weren't right for me.
It's already happened 3 times though in my life and it's just horrible.
I know when people have been together-for a while and live together then somebody else can seem new and exciting.
It's a confidence thing on my side, I've just seen it before where an ex would come home saying he met this "really cool" girl that day who "plays guitar" and "does rock climbing" and all these hobbies that men seem to gush over women doing for some reason.
Then they start getting closer and he ends up cheating on you with her and leaving to be with her.
I can't take it happening again but what can I even do.

Has this happened to anyone else and how did you get through it?

It's a chance you take when you get into a relationship.

Hopefully you're choosing to date people now who are less likely to operate like this...you can generally get a feel from hearing about their previous relationships. Some people do seem to monkey branch between partners leaving no gaps in-between...I guess someone with that sort of relationship history might be happy to be setting themselves up with someone else as they end their existing relationship. Someone with more periods being single may be less likely to do that?

However, you worrying about it and being insecure is not going to do you any favours...if you act according to those concerns you can end up pushing partners away anyway.

There's no guarantees when it comes to relationships, you just to have to try to use good judgement and enjoy the relationship for whatever it is, you can't stop people leaving you. And if it's not right for them it's not right for you either. After all would you really want to be with someone who was fine with treating you like that?