Contact before marriage?

Hello, I hope someone can help me. I have been seeing a man who is a practicing muslim, we have spent quite a lot of time together, both in rl and online. We have kissed, but no sex before marriage. We have talked a lot about the future, getting married and having kids together. We love each other. But, recently he spoke to an imam, he reminded him about what is haram. Kissing is haram, holding hands, etc. He was told that even shaking a womans hand is haram. He was upset after, and scared to do anything wrong. So now we dont talk at all online, and when we have met randomly he is very polite and talk about just daily things. Things have changed, and I find it very difficult and confusing. Worry that I will loose him. Is this proper behaviour from him? Is he just trying to do things right? I guess im looking for answers and reassurance in this situation.
Last time we spoke, he phoned me, and said he still likes me and that we will have contact again. Hard to go and wait, when everything is so uncertain. But I try my best to be patient, I dont contact him, I just hope and pray that it will be me and him.