Miley Cyrus’ man just put himself in the doghouse with these pics!

Miley Cyrus and Patrick Schwarzenegger may have been dating for the last five months, but it looks like Arnold's son isn't ready to settle down just yet.

The 21-year-old was on spring break in Cabo San Lucas this weekend when he was pictured getting VERY cosy with a mystery brunette.

Judging by her sorority headband, the bikini-clad girl appears to be one of Patrick's fellow students at the University of South California, and it definitely looked like the two were more than friends as they danced together.

Although no pictures of Patrick and his mystery woman kissing have emerged, it certainly seemed as if they were about to in this snap:

The pair were then seen walking along the beach arm in arm:

We wonder what Miley will have to say about this! The singer has made no secret of her relationship with Patrick and has reportedly even been trying to reign in her wild-child ways to impress his mum, Maria Shriver.

The pair have apparently even discussed marriage and a future together, according to friends.

It's only been five months – is Patrick already getting cold feet?!