How do I know if I really like him?

I’m a 18 years old girl. I went back to malaysia last few weeks and I met a boy who’s 20 and from the first time I saw him I can feel that he quite like me I chat a lot with him about my stuff but he just can’t talk I don’t why and when he arrived at home he text me that he’s arrived at home and the day after he text me again asking how am I ? and where will I go tonight! and two days later he come over to my house again and we didn’t chat much because I think he’s scare of me..because he looked at me a lot and when I look at him. His eyes will turn to other direction.the third time he come to find me he hold my hand because he want to look at my nail.. and I felt his hands were sweating… what is that mean ??? and he looks nerves… and the forth time he asked me out for a movie and he said he just want me to go out with him and I promised him and we went for a movie but at that time he didn’t talk much to me and he didn’t express his feeling to me I was quite disappointed.after the movie I text him saying (thanks for taking me out for a movie and I really enjoy it which I don’t) and then he called me and chat with me and I quite straightforward with him I said why you didn’t have any conversation with me? and he said that’s his personality and he could help it.the day I left malaysia he come over to my house for the last stay and he asked me when will you come back again? and I will wait for you …. I just tell him when I will comeback and didn’t talk much…. he looked at me and I asked him why are you looking for and he said I have to looking at you because you going back to london very soon… at that time I like him a bit but I’m not really sure if I can get a serious relationshiop with him because I really mind his skinny appearance,not educated and got a rubbish job that earn very little money … when I arrived in london I called him and we asked me can you be my girlfriend and I reply him said we can try and I can heard his voice is very happy.. and then I asked him how many girl friend you have before and he told me 2 and he also told me that he’s not a virgin when I heard that I felt jelous and I don’t know why ….can you tell me why ???he asked me do you have a boyfriend before and I told him I have just for two weeks and this is not true. (I haven’t got a boyfriend before because I was too embbarssed to tell him that) and he knows that I’m a virgin…He said to he wants to take me back to his house for his family to have a look on me and he also said that he will bring me to his friends to have a look as well,… from this point can you tell me what is he thinking ? and I’;m not really sure if I really like him Please help me -from-suki