<human>: i [19F] have been dating my current partner [24M] for a little over six months now. (they've already graduated college and i'm finishing my second year.) it's the best relationship i've ever been in. i am incredibly in love with them and could definitely see us working out for years to come; they have become my best friend. and yet i'm currently experiencing is a commitment issue on my part. my most recent ex was abusive and pressured me into marriage - he was terrible - and scared me out of anything long term. i crave stability, but at this point in my life, i don't think long term relationships are what i need. in fact, i'm terrified of them. i've told my current partner about my ex, but not about my issue with long term relationships. 
all of this wouldn't be nearly as big of a problem if i weren't slowly developing a crush on my friend [20M]. my partner has specifically said they're against polyamory/open relationships, which i fully respect. but now i'm at a loss as to what to do. i don't want to lose my current partner because i'm in love with them, but i'm scared of being committed to one person and one person only at this part of my life. i feel as though i should just ride this crush out and ignore it, but at the same time i'm still faced with the same commitment issue.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: in a loving relationship for six months, currently realizing i'm afraid of commitment. i'm developing a crush on a friend and my partner is against open relationships. help???