What do i about my family/relationship/friends feud?

My girlfriend and i have been dating since we were Juniors in High School and we both been committed to each other. So yesterday we were both graduating form College. I wanted to take our relationship to the next level. So i had plan this for a few months now and i decide to ask her to marry me. So i waited to poop the question in front of everyone at the graduation ceremony. So i talked to the principle who was going to be handing out the degrees and i told him i am going to ask my girlfriend to marry me today at the ceremony. So i told him to have a paper that said Will you Marry Me? I said make sure you hand it to her. He said sure thing and congratulations!! So later in the day it was time for the ceremony and i was getting nervous. The ceremony was divided in 4 different parts i was in part 1 and my girlfriend was in part 2. So after i got my degree and part 1 was over i sat down in my seat. Then part 2 started my girlfriend was the 8 person to be called up. Once the principle said Esmeralda. I could see that the principle handed her the note. She looked at it said Will you Marry ME? She was confused and then that when i got up a walked to the stage and got on 1 knee and said will you marry me? Before she could answer me i hear some one in the crowed yell out wait. I looked over and i see my brother Alex and my 2 friends Drew and Leo running to the stage. I got off my knee and i said guys not know i am in the middle of something. They got up to the stage and then my other brother Austin came running to the stage. Alex says we need to tell you something. I said tell me after the after the ceremony. Drew said no this can't wait before he could say anything Esmeralda said i have to tell you something. I looked to her and i said what is it? She said i have cheated on you. I dropped to my knees and said what did you say? I took a quick glance around i saw everyone was in shocked so i look at Esmeralda and i said what did you say? I cheated on you! I said with who i hear Alex say with me i got up and i stared at him and i said really bro how could you you know i been with Esmeralda since high school. Before he even said anything Esmeralda said he is not the only one i had sex with. I yelled you had sex with my brother she said yes and also with Drew Austin and Leo. I again dropped to my knees this time in tears. Drew put his hand on me and i got up and yelled get your hand off me. I took the ring from Esmeralda and then i left the stage and took off and drove to my cousin house to spend the night. All day my cellphone kept going off with text messages i did not even replied to any of them. So then 3 hours later at my cousin Johnny's house the door bell ring so i told Johnny i will answer it since he was cooking. I go answer the door and at the door i see Esmeralda Alex Austin Drew and Leo. I said what do you want? Alex said bro i am soo sorry for what i did. I did not say anything then Leo said are you not going to say anything i shut the door on them. The next day the door bell rang but this time Johnny answered the door. He closed the door and he look at me and said this came for you. I opened the package and inside was a note which was from Esmeralda Alex Austin Leo and Drew. I read it and it said we are sorry for what we did to you especially how we embarrassed you at on graduation day. At the bottom it said can you forgive us?

SO what should i do? I mean i really love Esmeralda but idk if i can forgive her 4 what she has done and should i forgive my bothers i mean we r family and my friends i mean i have been friends with Drew and Leo since 1st grade should i let something they did bad go and move forward? Pls no rude answers Thx!!!