Is 28 too old to start settling down?

I have never compared myself to other people until recently, but i have been regreting my choice to live a nomad type life. Living IT life with 6 week contracts offered by my recruiting firm has given me a chance to work remotely since college and move often. The issue is I see young couples happy, and I know i could have had that. Now i feel emotionally stunted and lonely knowing the route I took will never let me have that. Assuming I leave the field now and settledown now I am still looking 7 years (35) until I catch up.
Is 28 too old to start settling down?
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