Is it weird that I'm 25 and only had one serious relationship?

Should I feel weird or like something is wrong with me I'm 25 and only had one serious relationship that lasted 3 years. We broke up when I was 21. I've been dating ever since but have not been in an official relationship since. I've had various scenarios happen, some where I wasn't interested enough so I broke it off and some with guys not wanting to commit and be serious. I'm starting to feel like everyone around me is in serious relationship but I've had no luck in almost 4 years.
Is it weird that I'm 25 and only had one serious relationship?
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