Hey man. Late to the party but I feel for you.
Listen, good friends, the lifelong ride or die types- are rarer than fucking diamonds. There are maybe two, maybe three people you meet like that in your whole life. If folks you thought were like that actually aren’t, that sucks but it’s not an indictment of you or your character. Its just the odds. Lots of people suck and go where the good times are, not where they are needed. And it doesn’t mean you can’t meet those diamond people later in life.
Suicide is often seen as an escape because people feel trapped in the “now”. They can’t see the future ahead of them. Well, let me tell you as someone was cheated on, got divorced, had a nervous breakdown, (9 months of meds, doctors and living with my parents) and built his life back brick by brick - new people, new town, new job- you have a future. I’m closer to 40 than 30 these days, and I’m telling you the pain fades. You have a future waiting, if you can get there.
My practical advice is limited. You’re going to feel how you feel for as long as you need to. For me, it was more the shame than the heartbreak. I felt like everyone could see my “failure” stamped on my forehead. That was bullshit, but no amount of people telling me so reduced that feeling. But it is just a feeling. Being cheated on is not a character flaw. Being abused doesn’t mean you deserved it. You’ve got to win the internal fight first - realize that feelings aren’t always reflective of reality and pull out of the tail spin. How you feel is a distortion, and it can be modulated. You’ll get there.
If you’ll forgive the cliche “Adulthood is realizing that Cheese is expensive and SO many people are on cocaine”.