Is it wrong to have make up sex?

My boyfriend and i had a big fight, he traveled and i was waiting for him to come back and finally when he did, i hadn't seen him yet and we had this huge fight over the phone, it's been a month since we've been fighting. On Val's day we exchanged text messages saying how much we loved each other, and i didn't bother calling him after that because i felt he needed his space and so did i. I had a break for about a week and i felt i should call him and work things out, so i did and we talked about everything and he wanted us to meet up, so i came over to his place, seeing him, i was overwhelmed with emotions and i realized how much I've missed him. We start talking and one thing lead to another and we made out, i wasn't thinking of anything else, i just wanted to make out with him. After a long day, we talked for a while and everything was resolved and he saw me off. I got home and my best friend starts yelling at me saying "you shouldn't have had sex with him, you guys have been fight for a month, couldn't you starve him a little? Don't you have any dignity?" I don't get it, did i do something wrong? Did i just lose my dignity because i had sex with my man? I'm beginning to think i might have done something i wasn't supposed to do, i got mad at my best friend and she's like "it's the truth, how could you?" right now, i don't care cos i cant reverse my action, i just want to know if what i did was wrong, so in case of next time, i'll know better.