Dude, at the tender young age of 24, you need to consider this a blessing. Life is a marathon, not a sprint. You'll have plenty of time to start a family but you're only young once. You should be enjoying those bar girls and not avoiding them.
The gym suggestion is the best one. Hit the gym, get in great shape, summer is coming. The secret, girls ooze over abs and arms. Get em tight and this will seem like a blessing from some past life that you can hardly remember in 5 years.