Paulo really should be pretty down right now. He's been fixated on Lucy for about a year and for most of that time thought she wanted him because of the kiss on the night of the play and then he's told it was all lies.
Paulo's lost a lost because of Lucy in last two years.
Although Tess rejected him, she seemed to slowly changing her mind until he played nursemaid for Lucy, leading to David's chiding and his reactive quest for pussy which led to he and Tess getting humiliated in front of the whole school, ruining any chance he had with her.
He was happy with cutie-pie Jasmine until his old attraction to Lucy flared up again stronger than ever until resisting it became useless and he felt he had to dump Jasmine.
Rachel, a giant sweetheart who's good in bed, fell in love with him but he never considered taking her as real lover because of his feelings for Lucy and finally she gave up.
None of this is Lucy's FAULT per se, but it was BECAUSE of her and when she tells Paulo she never liked him despite all the behavior to the contrary it means he missed all these opportunities for fulfilling companionship for nothing.
Paulo doesn't get angry at girls (except Sue) but he should probably be bummed out that all this headache was for nothing.
But I guess instead he'll end up with Daisy, someone who's never showed any romantic interest in him and vice versa.