This is affecting my mental health

Okay ladies so I have this problem. I just turned 19 and I have never been in a relationship. I’ve tried almost everything I have tinder I go to the gym to see if I can meet anyone there and nothing. It scares me that I will never be able to find someone and I just feel like guys are not interested in me. I don’t know what to do all I know is that it upsets me a lot and I can’t stop thinking about it. I affects my confidence level and my self esteem. Is it normal to never have been in a relationship or have done things at this age. I just feel like everyone around me is in relationships or have had them in the past. I also find that all guys want is my snap chat and ask for nudes or sex without even having a conversation. Should I settle for this I’m not sure.