He deleted his comment on my pic?

so there's this guy I've been talking to for a while now. We both like each other (or at least, on my part, I'm sure that i like him) i posted a selfie on fb which he liked and commented on. His comment said "my girl <3" to which i liked and responded "my boy <3". Few days later i found that he deleted his comment, although he still kept the like on my pic. I know it seems kinda petty but what does it mean? Should i be worried? Also we have 0 mutual friends
He deleted his comment on my pic?
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