Relationship Problems

Good Afternoon,

Me and my partner of 5 years are having some problems reconnecting emotionally (more my side) he tends to be over emotional and that's where we are different. He had a meltdown the other day and now I feel like I can no longer cope in this relationship. He's had a few moments but not as bad as that in a while. We live in rented accommodation and well it technically is like property damage. I am worried about our future and whether he could cope with increasing adult responsibilities. He wants to work together and seek help for his mental health and understand his condition more but I am not sure whether I want to. I was all excited and happy about being able to have some time together as we booked the holiday on the same day as he had a meltdown and my mind has done a 360. I have to do everything for him which is starting to get on my nerves. He needs some self sufficiency.  He doesn't know any coping strategies other than ignoring it, distracting his mind with his interest or self harming. 

Please help.