How do you deal with anxiety ?

I feel so down about myself I literally cry ..... I’m 26 back when I was in my high school days I use to be a little outgoing now I’m just always locked up in my room not doing anything rather just be home relaxing . It’s like I do wana go out and have fun make new friends but don’t know what’s really stopping me :(

I’ve been with my boyfriend for a year and couple months and our relationship is fading due to me not doing anything he always tells me I’m ruining the relationship because I don’t like to do nothing and just like to be in my room and tells me he’s not a homebody .

How do I improve myself :/