I'm very lonely and people only bother to give me company if they can sext me...

I just chatted with someone because I felt suicidal and needed reassurance. They stayed up for me, but after I calmed down, they asked if I could send them pics. I refused. After that, I felt really shitty again because it seems like every time I talk to someone, they either try to tell me I'm being dramatic and shouldn't feel the way I do, which doesn't help, or they want something sexual. And as soon as I refuse, they just lose interest in me. So after I refused and shared my suicidal thoughts with him, he just told me, 'You do you.' and ended the conversation with that...