Does anyone else have this same issue?

I've talked and gone out with so many men in the past few years but have never talked to the same guy for more than a few months. I had a 4 year relationship during high school but that was just kid-like petty "love" and have never been in a real relationship as an adult. I see all of my friends and best friends getting married or having been with the same partner for years... 

Then here I am, just floating around I guess. It makes me feel down sometimes so I suppose I'm just looking for reassurance that there's still hope for me haha. (btw I'm 26.)