Neville

You and Neville had been a couple for a year, he was quite insecure because of Slytherin's comments towards him because they used to tell him that he was fat and ugly and that you were only with him out of pity

Lately you haven't been able to pay much attention to him because you were busy with exams and the Slytherins took advantage of that to bother him more. One day, after your last exam you went to look for Neville to spend time with him when you tried to kiss him he pulled away and said
Neville: don't touch me...I know I disgust you and that you only go out with me out of pity...

You and Neville have been a couple for a year, he is quite insecure about his body because he is chubby, thinking that you could be with someone much better than him, that's why you always have to remind him that you love him