Unsure about his feelings... help and advice needed

Hi, Back in December I met up with a man, who was helping me write a piece of research as he is an expert in the field. We met in the pub at his town, and we got on really well - chatting and laughing etc. When we left the pub, he insisted on walking me to the station, where we stood chatting for a few minutes whilst waiting for the train to arrive. At this time, he was what I would I say was in my personal space and it felt like we were going to kiss. Ten minutes after I had got on the train he sent me a message saying it was 'such a delight' to meet me. A week later - to the day and hour - he sent me a message calling me 'gorgeous' and that he 'hoped to see me soon'. We exchanged a couple of texts throughout January - he put a couple of innuendos in them (hoping to firm things up) and (i'm always scoring). Well we met again in February in a pub in London - supposedly to help with my research but we spent all the time just chatting. He gave me a few compliments at the start of the afternoon, nothing spectacular - just stuff around teh work that we were doing and my interests. He subtly tried to ask whether I had a boyfriend; inviting me to a show and saying I could bring my boyfriend - if I had one - which I do. The later the afternoon drew on the more compliments he gave me - saying that I was gorgeous and things like that- we were being given what he described as 'dirty looks' by one of the barmaids. He said it was probably because he was old enough to be my dad and that they were jealous. He moved closer to me...and did the subtle touching thing - touch the should, touch the arm and then he rubbed my thigh. Just after he rubbed my thigh he stood up and kissed me - with tongue action. After we had finished he said 'hmmm' and went to the bathroom. When he returned we kissed again - again with tongues only this time it was longer. I felt so guilty because of my boyfriend but at the same time I also have a crush on him. He kept trying to kiss me and I said no because I wasn't that sort of girl - he said he was the sort of man. We had a cuddle, he swept the hair out of my face and kissed my forehead. He told me that my boyfriend is lucky to have me and that he hoped that he appreciated me. He told me that if I was ever single I should let him know. I said I would and admitted that if I was single I would date him. We held hands on the way to the station, he tried to kiss me - to which I refused. I messaged him the next day to see if he had removed the beer goggles and that he got home safely, (I'm the sort of girl who likes to look after people) he messaged back saying he did and it was fun...I said it was interesting to which he agreed. He admitted the booze played a part in it but wasn't just that though. Since then we haven't met again, but we have text, Skyped and Tweeted...although we haven't really talked about the kiss...we flirt slightly...he calls me baby or my girl or darling and we still put a few innuendos in the conversation. Anyway, I don't know what to think any more. In a way I think it was the alcohol talking but then again I also think that it could be drunk words sober thoughts. I mentioned in passing at the start he is almost double my age - he is 42 and has been known to cheat. I look very similar to his ex-fiancé so I think that maybe something that attracts him to me, but I'm not sure. How do I know whether he does like me? Any advice would be greatly appreciated and what should I do next?

Or maybe he realised you HAVE a boyfriend.

From all that you've described he obviously loves you. I'd be more inclined to say his love is a physical affection though. There may be some emotional on the side too, such as the shared interests. But all his compliments of darling, my girl, gorgeous etc imply he's heavily in to how you look. The kissing supports this quite well, along with the touching. Factors everywhere suggesting he's more into how you look than how you act. Also you say you think it was just the booze, but he said the booze was part of it, but there was more too it. Implying yes that he loves you, plus the fact he said that if you were ever single hit him up. There are heaps and heaps and heaps of facts in here that heavily suggest he loves you, in more of a physical sense in my opinion but, clearly feelings are there. He backed off cause you had a boyfriend. The reason he didn't back off when he was drunk was cause well he was drunk. My advice would be stick to your current boyfriend. As I assume he likes you for who you are, which if generally a better, healthier relationship. I'd recommend not getting with this person, unless you want a primarily physical relationship i.e kissing, cuddling, sex etc. And little emotional support. You can still talk to him obviously there is no harm in that, from what I can tell. Just be careful when he's drunk or tries or overstep boundaries, you have a boyfriend, you don't want this dude to wreck that relationship for you. I wish you good luck with your relationship and have a wonderful day :)