You need to communicate these thoughts to him and meet half-way more in your love languages (for example he hugs & kisses you more whilst you put some effort into gift giving Etc). And make time for each other! Go on some dates.

Re: depression. You should really go get that diagnosed, especially if you suspect that this has been going on since childhood. You could have clinical depression and if so, this can be easily cured/countered with medication. Don't put up with health issues any longer than you have to, this depression is also likely negatively exacerbating issues in your self esteem and relationship.