Unbind These Freaken Chains Men I need your advise (18 + please)?

Well.. it's been a year that I've been experiencing my boyfriend's emotional withdrawl. Prior to all this our relationship had a strong foundation & we were totally connected. But now everything is disarray. Actually it's more like whatever struggle he's going through has affected our relationship considerably. In the past year I've shown repeatidly that I'm here for him, that I'm not out to hurt him, or judge him. He's asked for space & I've given it to him, I have tried earnestly over & over again to find out what is it that he's going through but he won't open up (which shocked me) and I'll admit my pride got in the way a bit because I took such offense that he won't open up. Then I became annoyingly narcissistic b/c I thought for sure the problem was me or that he didn't want this relationship anymore (sigh) He's told me that he's not sure what he's going through but that it has nothing to do with me... So i started to observe that he slipped into depression he has withdrawn from friends & family, he no longer goes to church (he's more religious than I) he's uninvolved in the things that used to interest him, & he gets sick more often, I haven't heard his laughter in a long long time, he's converted into a hermit.Throughout the year we have gone back & forth trying decide whether we should stay together (we have never broken up & we're going on 3 years) consequently whenever 1 of us wants to break up the other doesn't. Anyways a few weeks ago he was very serious on breaking up he said it's not working out cause it's unfair to me. I just told him that from the moment I said the words "I Love U" i meant it through good times & bad times... cause it's so easy for anyone to be in love when things are always good. I cried so much that night, I just stressed to him that whatever he's going through things will get better.. he finally said "fine u win, but i dunno why u want to deal with the unfairness of it all" & i exclaimed that i wasn't going to stay if thats his reaction he said: "no, no, i'm just tired right now but I don't know how we're gonna work this" ... Anyways fastforward to present day his job laid him off eariler than anticipated last week & he was sick (again) i came over to his place so we could eat dinner togther but i didn't stay cause i didn't want to catch his cold.... the next day I called him to see if i could come by & check up on him plus i had some stuff for his cold, he never answered my calls or text so i just figured he was probably sleeping off the sickness, the following day i knew he must have slipped into 1 if his moods where he doesn't respond to anything.. so the following day i asked if he wanted some brfst he responded no & then stated he just wanted to be left alone... i then drew some postive reinforcements & emailed him he then stated to just please let him be b/c his anxiety is already high enough I then stated that he's not alone & that even if he feels lost or that it's hard to trust that Im here for him...well he spat in my face by saying that he feels smothered & to please back off... I called a friend of our's who has been trying to talk to my boyfriend in his opinion he said that it's tough to get through to my boyfriend, our friend was under the impression that all this was due to the relationship until i mentioned my boyfriend's withdrawl from everything & he agrees it's probably something more...Anyways my boyfriend is leaving with a friend this weekend... I've been thinking about gathering all the stuff i have thats his put in a box & drop off @ his house & then get my stuff, as well as close out stuff he have together. I don't want things between us to get worse it hurts enough as it is... I don't plan on staying friends.... Anyways Good Idea or Not?