travel with a lovely girl

Now im dining at a Indonesian restaurant. Today, talked with AYAKA. I suggest her to travel into Philippine. She said,  if you come and pick me up and see me off to my house, I can go. I want to stay in Philippine, so i dont see her off necause it costs much money. The payments is useless. I am struggled with her suggestion. If I traveled with a pretty girl, it would be happiest.
I am gonna try to give her another idea to travel in Japan.

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"I'm currently dining at an Indonesian restaurant. Today, I had a conversation with Ayaka. I suggested to her that she should travel to the Philippines with me. She replied, 'If you come and pick me up and see me off at my house, I can go.' I'd like to stay in the Philippines myself, so I won't be seeing her off because it would be costly. The expenses are not justifiable. I'm struggling with her suggestion. If I were to travel with a lovely girl, it would be the happiest experience.

I'm planning to offer her another idea for traveling in Japan."

pick me up and see me off at my house

it would be costly

"The expenses are not justifiable" は、「支出は正当化できない」という意味です。この文は、ある支出や費用が、それに見合った価値や理由がないと感じられる場合に使用されます。

"a pretty girl" は外見的な美しさに焦点を当て、"a lovely girl" は外見だけでなく、性格や愛らしさにも言及するより幅広い意味を持っています。