Many Americans and some British English speakers find the use of liking here acceptable. This is presumably due to high levels of immigration into the USA and the difficulty immigrants have learning to contrast simple and continuous tenses. This tense 'misuse' is then spread to other countries such as the UK through TV and films. There are times when the grammar 'error' can be used very effectively to add a dimension of meaning.
However, if you take an American exam such as TOEFL such uses will be marked incorrect.