Need help with friend issues

Hi, I was looking for some advice from someone because I'm really troubled by my current situation. I have a friend, who i won't name, but he is my best friend and has been for the past year and a half or so. We always walk to and from school together and we talk a lot. Now, i genuinely feel that i couldn't bear losing him as a friend yet recently he has been spending more time during school with another person called tom. now i have been starting to get really jealous and have ended up just walking off and going into my form room for the entire of break because i get angry when i see him with tom. in the mornings he always seems really depressed but by break he will be fine and will be with tom. My other close friend thinks that my best friend has become quite distant from us too but i have no idea what i should do because as much as i like my best friend, he is quite stubborn and if i told him this stuff and how i felt i think he wouldn't really care. if anyone has any advice it would help as am all out of ideas

Hi I had also a school friend that hang up with others. And it made me jealous too. As i was younger. When you get older you will more tolerant with that. As I dont know your age. Try to speak with others too, like your friend and trust me you will meet other persons and make more or better friendships in ypur life. Dont worry.

hi thanks I am 14 but my friend and I act a lot older. that's the thing though, I could go and fins a new best friend but I don't want to because I really like my best friend currently and I'm doing everything I can to make sure I'm his best friend too.

yeah thanks for the help I will try to talk to him this weekend. I will try to remember to reply to this thread to tell how it goes.

hi, things have seeming to be taking a turn for the better as we are hanging out a lot more and I am less angry when he hangs out with other people at school. thanks for the help guys.