He said: "I am very honoured that a big club like Celtic are interested in me and a loan deal right now would suit me perfectly.
"My main priority is to get back playing regular football. I really miss that. The World Cup this summer is a really big thing for me. I know that if I'm not playing regularly my chances of playing in South Africa will be badly affected.
"It would be my second World Cup and I want to get the best possible build-up to it.
"Unfortunately, I haven't played a lot of football recently and that's why I feel I have to leave Arsenal.
"Hopefully something will be in place over the next few days but I'll wait and see."