This is wht i personally think... being a grl.. i know that there is always gonne be some kinda insecurity about ur guy...well seeing things around, all i wanna say is that R U FOR SURE THAT U"LL STILL LOVE HER THE SAME WAY AFTER 4 YEARS AS U DO NOW?? i am saying this coz i've seen many cases where a guy/grl comes to US with their bf/gf back home.. indeed they love them but once they get here... they meet different ppl and same thing applies to ppl back home.. it is natural... that being a human... ur feelings change!! u tend to have stronger feeling towards the ppl whom u see everyday than towards those who are thousands mile away... anywys.. in simple plain words.. i'd say that visit her and if you are sure that NO GOD DAMN THING CAN CHANGE UR FEELINGS TOWARDS HER...then u know wht to do...4 yrs is not that long... its worth waiting...BUT if u don't have taht attitude, don't make her n urself float in the air...let her go...Good Luck..n best wishes... P.S: some ppl might not agree with me... but it is just my opinion.. they don't have to follow this!! :-)