Boyfriend that sucks at texting

So the guy I’ve been seeing asked me to be his girlfriend Friday. I get a text from him today after I accidentally left some earings at his.

His text: If you’re my girlfriend now you don’t have to plant things as an excuse to come back over 🙃

My response: Ahaha genuinely forgot them but okay good to know 😇

2 hours later he just haha reacts to it..

He was always bad at texting and this is his first relationship (20 year old).

Should I be worried about that text exchange- mum said no but I want other people’s thought. Maybe he’s busy or doesn’t know what to say? Thoughts?...