If that's what you want, and being single or alone makes you happy then that's a good choice. Some relationships do suck. Others ? They can be deep, wonderful, transformative and fulfilling. It takes work and commitment from both partners, but I think the rewards of love and understanding make it worth the risk and effort. For me personally, I have just gone through a horrible breakup. It has been crap. But I don't want to close myself from love, due to the risk of hurt and pain, no matter scared I am. I will be far more careful, and far more aware of the dangers, but I am not going to hide away from it.
Gradually in my own time, and in a prudent way, I will try again.
^^^^ These are the things we go into relationships for ^^^^