Are you being unreasonable: that your bf & his ex should not be friends, for now?
No, it's to be expected -- since your relationship is relatively new. And well, it's also to be expected: may slight hang-over pa sila sa isa't isa. Well, they've been together for a long time -- the heart never forgets; habits are hard to break. But it doesn't mean wala silang closure.
Oo dapat your bf should not be as accommodating, to not complicate your relationship.
But -- this can be tricky, you gotta play your cards well.
When you talk to him, do not come across as making him to be insensitive/clueless (wala kang delicadeza. What were you thinking of?!). Or, you coming across as macuenta (that was my car! Eh kahit na car nya, hindi ka matutuwa. That was my car, you are my bf: what, he's a possession too?). Or, you are a dictator (clear everything with me 1st like that logo before you do anything)
Instead, appeal to his chivalrous side: na he wouldn't want to hurt you unintentionally, nor prolong his Ex's inability to move on. The best thing is to cut & cut clean, tell him. To protect your relationship, as GIRLTALKER2 explained.
No sis you're not being unreasonable after all you're fair, slim, tall and have been complimented for your looks. 
^you are amusing.

As for TS: Well, you probably latched onto this comparison in a fit of naïveté. See, if ang basehan nga ng success of relationships eh ganda: yang mga Miss Universe natin shouldn't have encountered heartbreaks in their marriages. Just saying, be mindful.
So, yes -- you were jealous there. You say "no", coz she rates lower than you in the looks department. IMO, you are jealous: because of the long period they shared together. There is an intimacy level & familiarity level you 2 have not yet achieved since bago pa kayo. Don't focus on The Past: it has nothing to give you. Instead, focus on giving him a life/relationship that's better than the one he left behind.