Still not sleeping the night

An

Hi everyone my LO is almost 6 months and still won’t sleep through the night. He wakes up once and I’ve tried everything. Before he would go to sleep after a bottle but he seems to just fuss and fuss. Idk what to do. I’ve tried feeding him more. Making sure he naps etc. I haven’t sleep trained because when I tried it I couldn’t bear him crying. Is this really the only way?