Sure, the Internet hasn’t been around that long, but meeting people via a phone connection has. My dad used to run a BBS in the late eighties and early nineties, and so many of our members (I was CoSysop at 7 ^_^) got hooked up it wasn’t even funny. And most of 'em are still together.
I’ve only been dating my boyfriend for a year and a half (or thereabouts - he keeps track of it more than I do). I’d assume that a lot of people wouldn’t think we’re in a “lasting” relationship because we have no plans to get married. However, we live together, split costs, rarely fight, love each other, and plan on spending the rest of our lives together. We both have moral issues over marriage and won’t go there, but essentially, we ARE married, just lacking in the little piece of paper that says so. His daughters think of me as their stepmom.
I hate having to justify my relationship to people - friends are sucky, but family is the worst. According to my grandmother I’m living in sin - not because we’re not married, but because he’s 14 years older than me (my parents are 14 years apart but THEY weren’t living in sin…). Whatever.
No one can define your relationship except you, and never let anyone try.