Feeling lonely in a room full of people

Lately I just feel so alone even when I’m a room full of people. Everyone is so happy and finding SO while I’m just alone. I don’t feel like I can talk to anyone because I feel like I am either annoying them or putting a burden on them. Also, I can’t talk to my family cause I feel like they will be disappointed or break their heart that I am feeling this way and that’s too much for them to handle right now so it’s best if I act like everything is okay.