Advice on how to let yourself be happy?

I used to face this A LOT… I mean I still do- but not as much. I remember having those moments where id be happy and laughing and my brain would go “why are you smiling…? You dont deserve to.” And my entire mood would just die down 😭😭 honestly I didn’t really do anything I just felt it for a while then got kinda numb to it- but I guess I just let myself think whatever and then just continued feeling happy even if it was hard- I also made sure that I had good/understanding people around me. They would notice whenever my mood died down and they would reassure me like “hey, dont worry” or something like that… of course it didnt stop the thoughts but it toned it down. These days when I have those thoughts I just tell my brain to shut up 😍 and try to remember that this is all psychological- and if that doesnt work and I start crying I just blast loud music in my ears 😭😭

I go through this too. I approach it like you have learned with other intrusive thoughts. Breathe. Look at the thought and just notice your feelings. Then focus on stuff in the room. Who is speaking? What are u doing? Notice how u are siting. Ground yourself and maybe do some breathing exercises. It gets easier I promise. What also helps me is looking at this in the grand scheme of things. We are just one person on a floating rock in the middle of no where. Life is so short. In the grand scheme of things our problems are tiny. So just try your best to make the most out of a shitty situation lol. Idk why that makes me feel better but it does. If you have ever seen the midnight gospel, It’s in Netflix and u just watched the last episode, it really spoke to me about this. If u like weird stuff lmao I recommend it. Oh! And meditation helps me also, it is not about “not thinking” (which is impossible) it teaches you how to acknowledge your thoughts and then switch focus which is really helpful. I recommend the insight timer app!