Dating issues

I’m a 19 year old living in Cardiff, Wales, UK and I find myself so lonely sometimes and I’m really putting myself out there to date but I’m getting no luck.I’m quite a fat guy so I guess that’s why; I’ve got all the dating apps and whilst I get some people message me it’s never really ended in a date.I’ve done the NSA thing before now and it’s not really my “cup of tea”. I’m really lonely at the moment and I’d love to have a boyfriend in my life but I’m struggling to find that. Any advice?