Forever Alone

Does anyone else feel like they are going to be single for the rest of their life? My first relationship was in 2013 for 10 months. My second was in May of this year and lasted a month. I’m not very outgoing. I only really go to work (I work in a nursing home so no cute young boys there). I’m 21 but I feel like I’m never going to find the one. I know they say you find them when you stop looking but like I’m scared I’m going to find them too late and we won’t be able to have kids and stuff. Idk any advice or tips or help?