I agree with
@Just_a_guy about this.
If you can try to improve your mental and physical health as much as possible, that will probably make you happier directly, and also make you more appealing to a potential partner.
If you get out more and put yourself in situations where you can meet someone, that will increase your chances of being in a relationship. It's tough to meet someone if you stay inside your home all day, unless you meet someone online, or someone introduces you to someone.