我的一位负责我出国的老师想和你讨论一下我提高英语的事情。

The teacher who is responsible for me to go abroad wants to discuss with you about how to improve my English .
be responsible for 负责。。。
discuss with 与。。。讨论

XXX is my teacher and responsible for my going abrod. He/she wants to discuss with you on how to improve my English.

分两句会比较好,最好带个人称,否则不太尊重

the teacher who responsible to me for go abrod wants to discuss with you about impooving my English levels.

one of my teachers who is in charge of my going abroad wants to have a talk with you about how to improve my English.