"It is comfortable to be with you" 或者 "I feel comfortable being with you" 可以用来表示"相处起来很舒服"的意思。这个表达方式来自英语中"comfortable"这个形容词，它的意思是"舒适的、安逸的、自在的"。
下面是一些使用这个表达的例句：
I'm glad we're friends. It's comfortable being with you.
It's always comfortable to be with you. You're such a good pstener.
It's comfortable to be with someone who understands me.
对应的中文翻译分别是：
我很高兴我们是朋友。和你在一起很舒服。
和你在一起总是很舒服。你是一个很好的倾听者。
和理解我的人在一起很舒服。