I don’t know about anyone else, but I think it’s quite odd that she counts ‘boyfriends’ that she had when she was a young teen and didn’t have sex with. For me, it seems like she’s almost insecure that Tom is her only ‘real’ relationship, and I wonder if that’s part of the reason that she’s scared to settle down with him.
I also found her ‘aw, you’ve never been a fresher’ comment funny. Like, sis, you did a one year art foundation, spent your freshers week crying and went home every weekend to your parents