Need advise: Ex colleague now hates me because i returned to our workplace after I resigned..?

I resigned last year at XYZ company november cos I got job offer. Worked nearly 2 yrs there.I trained this new lady (sophie) few weeks befor i left.This male ex colleague (lucas),married guy,was one of the people I treat very good friend in XYZ.Now, things didnt work out with the new job,stayed 2 months only. I planned to apply somewhere else when my ex manager at XYZ called and said she wanted me back she found out i was jobless cos they love my work ethics.Lucas was one of the peeps i was excited to see & work with again,BUT i noticed he was treatin me coldly but i thought he was just having bad day.He wasnt speaking to me at all. I spoke to him and i found out that the new girl,sophie was moved to our other building and that theyre in relationship.He told me its unfair sophie has to be moved as result of me returning to XYZ.they both angry at me cos they thought seems management gave way for my return but other people there said shed stil b moved cos either of their relaionship or lack of people in the other building.I heard sophie's performance at work is not that good.I said sorry to lucas if i hurt him.I said I dint know somebody wil be moved cos of me.I cried to him bt still he doesnt speak 2 me anymore.I was so hurt cos seems like he threw friendhsip away!some people say i dont hav 2 feel bad cos her transfer wil hapen bt y they angry at me?I tried speakin 2 sophie too bt she'd just dismis me.Lucas is also not d same he was before even 2 others there.Must i feel bad??