I cannot hurt her more….

How can I tell my friend not to marry her non-believer boyfriend, when she is so inlove and currently having difficulties with their personal circumstances, and they are in the process of resolving everything, because they are so inlove with each other. The wedding is near if permitted, but other friends are telling me, that it is my responsibility to rebuke her, its hard, know why, last year they have done that to me, repeatedly convincing me to rebuke her, so last year I did, but what happen is that her boyfriend ended up texting me foul words and hard words, it turns out my friend even sided with her boyfriend, so again one of our friends suggested me to totally layuan my best friend, I did, we had a cold war, but you know what happen next, that time I find it left behind with the situation, this friends who convince me to rebuke her are totally not affected with the situation. And thank GOD also because after 2-3 months of not talking with my friend and missing her we both got back. Then I told her that im not going to make pake-alam na their relationship, so here the situation go again, a friend again is giving me the responsibility to rebuke her, for days I was bothered and keep on thinking, I decided not to do it again, especially right now na I know marami siya/sila pinag daraanan, just the thought na pag sinabi ko all sakanya, masasaktan siya, nasasaktan na ako.. so I decided na not to, I believe she is matured enough and with enough wisdom to know what’s right and not, what’s GOD’s will and not, what’s GOD’s words and not, I defended sa friend namin na if gusto niya since alam niya, he rebuke her instead kase iam not going to do it na again, so sabi ko hindi ko kaya. And if ever GOD really permitted their marriage, well I think it is still in GOD’s plan and GOD’s will, I believe every thing happen for a reason and that reason we don’t know, and only GOD knows. c”,) so i'll pray for her/them and let GOD do the work c",) also I will ask GOD for forgiveness if this is a sin c",)