partner going on a contiki tour

Hi mums my partner and I have been together for almost 6 years he is 24 and I am 22 and we we have a 2yrold boy together we have never done anything not even for anniversaries or been anywhere together. Things in our relationship have been very rocky as of lately but we have been hanging in there trying to work it out my partner has an online gaming addiction he works very hard to provide for us so I can be a stay at home mum but there is no affection after work he comes home sits on the lounge plays with his phone after dinner goes and plays his computer in bed on his phone again and then rolls over without cuddles kisses or sometimes even goodnight I'm feeling very emotionally neglected I have told him but he doesn't seem to listen , I have been asking my partner for what seems like forever to take some time off work so we can do something as a family go on a holiday together but each time he responds with he can't take time off work or we can't afford it for me it's not the money it's the effort going camping would be enough for me I should mention he works 6 days a week so weekends don't work for us either. Anyways I went with our son away yo help my best friend give birth to her baby while I was away my partner and I talked about everything, he won't talk face to face he just shuts down he has only just started talking about issues through messages we talked about what we both want I would like another baby and to be married but he said we cannot afford it as we are not very good at saving and then a few days later he called me and asked me if he could go on a 11 day contiki tour around the west coast of America his uncle had asked him to accompany his 21 year old cousin his cousin has mild aspergers and I can understand the concern of his father BUT his cousin goes to Sydney or Melbourne every weekend to watch the soccer alone meets up with other soccer fans and goes drinking I feel that if he is capable of doing that I don't understand why he can't go to America alone. Anyway I decided that it's 11 days and I need to support my partner in supporting his family even though I was extremely upset as I feel he puts his family before us when he was finding out dates the tour has now gone from 11 days to 18 days and he has taken 3 weeks off work (all of his holidays) the trip is payed for by his uncle he just needs to organize his passport and his spending money I'm not on with him going and he knows it but he told me he is going regardless of what I say, after him never doing anything for me or with me or as a family with us I'm feeling very hurt by this situation. I have a history of depression and anxiety and everything is just becoming all too much now I used to take my son out everyday to the park or beach we would go to the gym and catch up with friends now all I seem to be doing is laying on the lounge with him and watching cartoons I just feel lost.