James was, will be, and continue to be a hopeless romantic. He was many things, and probably he wasn't the best person, but if he loved someone, he gave himself completely to that person.
And James was a one-lover in general. Because when he fell in love with you back when he first saw you on the train, even then he knew he wouldn't like anyone else. And it happened like that.
That’s why when you refused him for a long time and then abruptly - and unexpectedly decided to recognise his feelings as mutual, it turned out that he was... absolutely zero in romance.
At first, he was too over confident and arrogant. Secondly, he never held anyone's hand, never kissed anyone, only hugged, but those were his friends and here you are! He loved to give gifts and loved physical contact, but around you, he was a complete loser and was too proud to admit it.
His hands feel wobbly, his fingers are wet with sweat, and his face is always red, and excessively so. And what are you supposed to do?
Because when one day you were just having fun in the common room while it was empty, first he teases you and tickles you, squeezing your sides. Slowly your positions change and then when he's on top of you he just... doesn't know what to do.
What if he kisses you and you don't like it? He doesn't even know how to kiss!