I messed up. Badly

To make a long story short: I signed up for bumble bff at the suggestion of my older cousin. I’m 23, in a relationship with a guy I really, really like. We’ve been together for a few months now, and it was going great. I know there’s no excuse, but I didn’t tell him I signed up for bumble bff. Making friends has been a struggle for me. I recently lost my best friend of 8 years due to a fallout we had a few months ago. My bf has brought me around his friends and family; and while I appreciate how kind and welcoming they all are the fact of the matter is if we were to break up I’d generally lose contact with them because they’re /his/ friends and family. I feel like shit because I’ve always been stand-offish around them and it really isn’t my intention to be that way. I really care about him, and he did reassure me that he didn’t wanna break up with me. A part of him knows that I truly wasn’t looking to be unfaithful, but it’s understandable that there’s some doubt there. I know it’s not about what I’m feeling, and I know it’s selfish of me to put my feelings in the mix. We haven’t been speaking, and he said he didn’t wanna break up, but I’m afraid he’s gonna change his mind. I would have to respect that, I know. But I’m still really afraid of it.

Update: sorry. I realize my head wasn’t clear when I wrote this. To clarify: I didn’t tell him I signed up for bumble bff