From memory ... the pair of you certainly looked happy and comfortable enough together in the pics you posted following your first trip in September. But there again, photographs in themselves being superficial, they can be - and often are - contrived.
Nevertheless, the overall impression I got at the time was, that things had gone well with the pair of you ... considering your earlier "reservations". And now it seems as though you're having further doubts.If so, then in fairness to you both, you really need to think long and hard about whether or not YOU want the relationship to continue.