Normalise saying "Astagfirullahi wa atubu ilaihi" the moment you feel jealous, get evil thoughts, feel disappointed and hurt. Trust me, all the negativity will flee and you will feel normal plus Allah will become happy with you!
Instead of saying, I'd never commit that sin say, “may اللہ never test me with it” we should never be too sure of ourselves, so it is better to ask اللہ to keep you away from it.
if they wanna talk, they will. if they wanna be with you, they will. if they wanna make things work, they will. don't let things be one sided. it's not healthy and it's not fair to you.