I have had a few relationships over the years, up to 4 years with a couple of people, or briefer with several, mainly until my early 40s, but either I didn't feel valued enough or they didn't seem to want me! I was always the one who called it off first, but really I needed to do plenty of therapy and self development before I could fully be up to a relationship. I was insecure, affected by childhood difficulties, unknowingly ASD 1.
In later life and with much learning, self development, therapy, Cocounselling, and subsequently training as a counsellor and therapist, I am more open and secure, and have a happy relationship with my partner. We are both older and wiser I guess. Together several years and marrying in September.
We are very different, but have some common interests, including psychology and self development, gardening and nature, walking and keeping healthy, reading, watching fantasy and crime and action films, pets, food, the seaside and swimming, etc. They are practical and competent, high energy and motivated, I am easygoing and playful, not too practical, rather clumsy, enjoy writing and crafts and er daydreaming.
I had to learn a heck of a lot to be able to do this, and probably I am more secure than my partner, but it works because I don't get reactive to them getting stressed with me. Well, mostly. And usually not a lot, though we do argue sometimes if we're both a bit stressed.