Make sure to stay warm and drink hot fluids as lower than ideal body temperature has adverse effects when suffering menstrual (period) cramps. Certain foods like ginger could be helpful so consider mixing it in to food you eat.
Friend is not a universal term unfortunately. It's probably one of the most nuanced term as you have friends for the sake of business (for example: classmates or coworkers), internet friends (ie: people on a forum or social media), friends you only talk to when you need something (friends with benefits which is not just the se.xual conntation), and mutually benefitical friends (meaning a friendship where both sides feel is an actual friendship).
The last category is true friendship. Most "friends" drift apart as their reason for meeting & talking goes away (for example, school friends after graduating). Friendship requires genuine effort to maintain so its important that a friend be worth making time and effort to try and stay in regular contact with. Fortunately, Life is full of opportunities to encounter and build friendships with others at different stages of life.