I have a friend on my course who I've been really close with for a while, however, I've been recently feeling frustrated as I've realised how clingy they are. We're good friends, and I appreciate the friendship - I do, but I just feel like I need some space from him every now and then to make new connections. I now feel it's starting to affect my ability to make new friends. I've been wanting to branch out on my course for a while, but he always wants to sit beside me and talk to me only. In tutorial sessions, he'll sit on a table on his own and expect me to join him. However, when I try and join other groups he just sits in silence, and waits for me to stop talking to others. It makes me feel pressured that I'm not talking to him, like I'm not giving him enough attention. There have been instances before where I'm walking and talking to someone else, and he'll just be behind or in front of me - again not talking - until we split and it's just me and him. It makes me feel awkward.
I know that he's had issues with friends and been insecure in the past, so I imagine that plays a role. I don't know how to approach the situation, and I don't know if I'm just being a bad friend by wishing this?