How can i spark our relationship again?

me an bf have been dating 1 1/2 yrs... we REALLY connect .. however we have had our share of issues.. now he seems to have lost interest in the relationship... or being in one altogether... i know he loves me.. & i love him .. we are not fighting ... i try doing "romantic" things but hes not much of a romantic (well i think he is i just think hes scared to show it) hes been hurt by grls in past that cheated on him & i feel like after a certain part in our relationship hes put up walls.. In the past he cheated on me 1ce long ago... & we both willingly moved past that & its no longer an"issue" inour lives.. but he did that bcz i flirted badly with one of his besties which he says made it hard for him to trust me & to him it felt like i may as well have cheated to him. like i say were both past the "issue" of it as its been awhile.. but i feel like weve come to a stand still & neither 1 of us like it & are fighting it, we just dont know how to get out of it.. anothr slight issues is that occasionally he gets super drunk & breaks up with me... then forgets about it in the morning or pretends like nothing happened. & i KNOW he was drunk so i dont take it personally, but it still doesnt make me feel like he really wants this still even though he says he does... also a lasting effect i have become rather jealous, & dont know how to deal with that... when we have talked he says he wants me to fully trust him again & bcz if i dont trust him its hard for him to trust me....makes since .. vicious cycle were stuck in... i really want to just have fun with him again the way we used to ..i feel like tht would help.... not alot of money both work, any ideas about anything? greatly appreciated.